50278 + Interview Questions in Physics Page 225 InterviewSolution

11201.	For the arrangement in figure: The elongation in spring in equilibrium condition is [take g=10 m/s2]
Answer» For the arrangement in figure: The elongation in spring in equilibrium condition is [take $g = 10$ m/s²]

11201.

For the arrangement in figure: The elongation in spring in equilibrium condition is [take g=10 m/s2]

Answer»

For the arrangement in figure: The elongation in spring in equilibrium condition is [take $g = 10$ m/s²]

11202.	Determine the electric field strength vector if the potential of this field depends on x,y coordinates as V=10axy.
Answer» Determine the electric field strength vector if the potential of this field depends on $x, y$ coordinates as $V = 10 a x y$ .

Discussion

11203.	Why a spark gap is left while making emp jammers
Answer» Why a spark gap is left while making emp jammers

Discussion

11204.	The power radiated by a black body is P and it radiates maximum energy around wavelength λ∘. If the temperature of the black body is now changed so that it radiates maximum energy around a wavelength 3λ∘/4, the power radiated by it will increase by a factor of
Answer» The power radiated by a black body is $P$ and it radiates maximum energy around wavelength $λ_{\circ}$ . If the temperature of the black body is now changed so that it radiates maximum energy around a wavelength $3 λ_{\circ} / 4$ , the power radiated by it will increase by a factor of

Discussion

11205.	Ashell of mass 0.020 kg is fired by a gun of mass 100 kg. If themuzzle speed of the shell is 80 ms–1,what is the recoil speed of the gun?
Answer» A shell of mass 0.020 kg is fired by a gun of mass 100 kg. If the muzzle speed of the shell is 80 m s^–1, what is the recoil speed of the gun?

Discussion

11206.	If a proton enters a region of uniform magnetic field with velocity v in a direction perpendicular to the magnetic field, then the time period of revolution is T. If proton enters with velocity 2v, the time period will be
Answer» If a proton enters a region of uniform magnetic field with velocity $v$ in a direction perpendicular to the magnetic field, then the time period of revolution is $T$ . If proton enters with velocity $2 v$ , the time period will be

Discussion

11207.	A block of mass 10 kg is attached to the end of two light spring balances combination as shown in figure. What mass will each spring reads? (assume springs are collaborated so that its reading provides the mass)
Answer» A block of mass 10 kg is attached to the end of two light spring balances combination as shown in figure. What mass will each spring reads? (assume springs are collaborated so that its reading provides the mass)

11207.

A block of mass 10 kg is attached to the end of two light spring balances combination as shown in figure. What mass will each spring reads? (assume springs are collaborated so that its reading provides the mass)

Answer»

A block of mass 10 kg is attached to the end of two light spring balances combination as shown in figure. What mass will each spring reads? (assume springs are collaborated so that its reading provides the mass)

Discussion

11208.	dispersive power of prism why not depend upon size and angle of prism as the formula of dispersive power derive we use min.deviation=(μ-1)A is only applicable for small angle of pris
Answer» dispersive power of prism why not depend upon size and angle of prism as the formula of dispersive power derive we use min.deviation=(μ-1)A is only applicable for small angle of pris

Discussion

11209.	63. An electric dipole is situated in an electric field of uniform intensity E whose dipole moment is P and moment of inertia is I . If the dipole is displaced then the angular frequency of its oscillation is ??
Answer» 63. An electric dipole is situated in an electric field of uniform intensity E whose dipole moment is P and moment of inertia is I . If the dipole is displaced then the angular frequency of its oscillation is ??

Discussion

11210.	A solid sphere is rolling purely on a rough horizontal surface (coefficient of kinetic friction = μ) with speed of centre u, as shown in the figure. It collides with a smooth vertical wall, the coefficient of restitution being ½. Choose the correct options.
Answer» A solid sphere is rolling purely on a rough horizontal surface (coefficient of kinetic friction = $μ)$ with speed of centre u, as shown in the figure. It collides with a smooth vertical wall, the coefficient of restitution being ½. Choose the correct options.

11210.

A solid sphere is rolling purely on a rough horizontal surface (coefficient of kinetic friction = μ) with speed of centre u, as shown in the figure. It collides with a smooth vertical wall, the coefficient of restitution being ½. Choose the correct options.

Answer»

A solid sphere is rolling purely on a rough horizontal surface (coefficient of kinetic friction = $μ)$ with speed of centre u, as shown in the figure. It collides with a smooth vertical wall, the coefficient of restitution being ½. Choose the correct options.

Discussion

11211.	A sample of monatomic hydrogen gas contains 100 atoms and all the atoms are in nth excited state.As the atoms come down to the ground state following various transitions, they release a total energy of 480049 Rch. (where, 1Rch = 13.6 eV). Find the value of N, where maximum possible number of photons emitted in the process is 7N × 100. ___
Answer» A sample of monatomic hydrogen gas contains 100 atoms and all the atoms are in nth excited state.As the atoms come down to the ground state following various transitions, they release a total energy of $\frac{4800}{49} R c h$ . (where, 1Rch = 13.6 eV). Find the value of N, where maximum possible number of photons emitted in the process is 7N $\times$ 100. ___

Discussion

11212.	Which is not true for three phase AC?
Answer» Which is not true for three phase AC?

Discussion

11213.	The resistance of a wire is R. If it is stretched such that its length becomes n times its initial length, what will be the final resistance of the same wire?
Answer» The resistance of a wire is $R$ . If it is stretched such that its length becomes $n$ times its initial length, what will be the final resistance of the same wire?

Discussion

11214.	A wire is bent in the form of a circular arc with a straight portion AB. Magnetic field at O when current I is flowing in the wire is
Answer» A wire is bent in the form of a circular arc with a straight portion AB. Magnetic field at O when current $I$ is flowing in the wire is

Discussion

11215.	For the given uniformly charged semi-circular ring, electric field at the centre is
Answer» For the given uniformly charged semi-circular ring, electric field at the centre is

Discussion

11216.	Four charges each equal to Q are placed at thefour corners of a square and a charge q is placed at the centre of the square. If the system is in equilibrium then the value of q is
Answer» Four charges each equal to Q are placed at thefour corners of a square and a charge q is placed at the centre of the square. If the system is in equilibrium then the value of q is

Discussion

11217.	A machine gun mounted on a 2000kg car , on a horizontal frictionless surface fires 10 bullets per second . If the mass of each bullet is 10g and 5he velocity of each bullet is 500m/s , then the acceleration of the car will be ?
Answer» A machine gun mounted on a 2000kg car , on a horizontal frictionless surface fires 10 bullets per second . If the mass of each bullet is 10g and 5he velocity of each bullet is 500m/s , then the acceleration of the car will be ?

Discussion

11218.	A red LED emits light at 0.1 Watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 m from the diode is
Answer» A red LED emits light at $0.1$ Watt uniformly around it. The amplitude of the electric field of the light at a distance of $1 m$ from the diode is

Discussion

11219.	Two trains A and B of length 400 m each are moving on two parallel tracks with a uniform speed of 72 km h–1 in the same direction, with A ahead of B. The driver of B decides to overtake A and accelerates by 1 m/s2. If after 50 s, the guard of B just brushes past the driver of A, what was the original distance between them?
Answer» Two trains A and B of length 400 m each are moving on two parallel tracks with a uniform speed of 72 km h^–1 in the same direction, with A ahead of B. The driver of B decides to overtake A and accelerates by 1 m/s². If after 50 s, the guard of B just brushes past the driver of A, what was the original distance between them?

Discussion

11220.	Simplify (2root3) (3+root5)??
Answer» Simplify (2root3) (3+root5)??

Discussion

11221.	28.If charges q/2 and 2q are placed at the center of face and at the corner of a cube, then the total flux through the cube will be a. q/ 2Eo b. q/Eo c. q/ 6Eo d. q/8Eo (Eo -epsilon)
Answer» 28.If charges q/2 and 2q are placed at the center of face and at the corner of a cube, then the total flux through the cube will be a. q/ 2Eo b. q/Eo c. q/ 6Eo d. q/8Eo (Eo -epsilon)

Discussion

11222.	15.Figure shows the practical realisation of a logic gate.identify the gate?
Answer» 15.Figure shows the practical realisation of a logic gate.identify the gate?

Discussion

11223.	Two identical wires are used to make toroids A and B of cross-sectional radius a and b respectively. Average radii of toroid A and B are r and 2r respectively. Find the ratio of magnetic field of A and B, if they are connected across a battery of emf E and 3E respectively.[ wire is closely wounded]
Answer» Two identical wires are used to make toroids $A$ and $B$ of cross-sectional radius $a$ and $b$ respectively. Average radii of toroid $A$ and $B$ are $r$ and $2 r$ respectively. Find the ratio of magnetic field of $A$ and $B$ , if they are connected across a battery of emf $E$ and $3 E$ respectively. [ wire is closely wounded]

Discussion

11224.	An electron gun emits electrons of energy 2 keV travelling in positive x-direction. The electrons are required to hit point S where GS=0.1 m, and the line GS makes an angle of 60∘ with x- axis as shown. A uniform magnetic field exists parallel to GS in the region outside the electron gun. The minimum magnitude of magnetic field needed to make the electrons hit S is
Answer» An electron gun emits electrons of energy $2 keV$ travelling in positive $x-$ direction. The electrons are required to hit point $S$ where $GS = 0.1 m$ , and the line $GS$ makes an angle of $60^{\circ}$ with $x-$ axis as shown. A uniform magnetic field exists parallel to $GS$ in the region outside the electron gun. The minimum magnitude of magnetic field needed to make the electrons hit $S$ is

Discussion

11225.	In the figure shown below, coefficient of friction between the 3 kg block and ground varies with time and force acting on the block is given by F=5t. Then, work done by the friction force on the 2 kg block upto 5 sec, from the frame of reference of the 3 kg block is: [Take g=10 m/s2]
Answer» In the figure shown below, coefficient of friction between the $3 kg$ block and ground varies with time and force acting on the block is given by $F = 5 t$ . Then, work done by the friction force on the $2 kg$ block upto $5 sec$ , from the frame of reference of the $3 kg$ block is: [Take $g = 10 {m/s}^{2}$ ]

Discussion

11226.	Electric charges of 1 μC,−1 μC and 2 μC are placed in air at the corners A,B and C respectively of an equilateral triangle ABC having length of each side 10 cm. The resultant force on the charge at C is
Answer» Electric charges of $1 μ C, - 1 μ C$ and $2 μ C$ are placed in air at the corners $A, B$ and $C$ respectively of an equilateral triangle $A B C$ having length of each side $10 cm$ . The resultant force on the charge at $C$ is

Discussion

11227.	How many maximum possible spectral lines are formed if electron is present in 6th shell
Answer» How many maximum possible spectral lines are formed if electron is present in 6th shell

Discussion

11228.	four equal positive charges are fixed at the vertices of a square of side (L). Z- axis is perpendicular to the plane of the square. The point Z =0 is the point where the diagonals of the square intersect each other. The plot of the electric field due to the four charges, as one moves on the z axis is
Answer» four equal positive charges are fixed at the vertices of a square of side (L). Z- axis is perpendicular to the plane of the square. The point Z =0 is the point where the diagonals of the square intersect each other. The plot of the electric field due to the four charges, as one moves on the z axis is

Discussion

11229.	From where gravity origins
Answer» From where gravity origins

Discussion

11230.	6. If the distance b/w two bodies is i creased by a factor of 5 by what factor would the mass of one of them have to be altered to maintain the same gravitational force ?would this be an Increase or decrease in the mass
Answer» 6. If the distance b/w two bodies is i creased by a factor of 5 by what factor would the mass of one of them have to be altered to maintain the same gravitational force ?would this be an Increase or decrease in the mass

Discussion

11231.	If the vectors →a and →b are linearly independent satisfying (√3tanθ+1)→a+(√3secθ−2)→b=→0, then the general values of θ is
Answer» If the vectors $\to a$ and $\to b$ are linearly independent satisfying $(\sqrt{3} tan θ + 1) \to a + (\sqrt{3} sec θ - 2) \to b = \to 0,$ then the general values of $θ$ is

Discussion

11232.	19. If the error in the measurement of momentum of a particle is (+100%) then the error in the measurement of kinetic energy is: a) 100%. b) 200% c) 300%. d) 400%
Answer» 19. If the error in the measurement of momentum of a particle is (+100%) then the error in the measurement of kinetic energy is: a) 100%. b) 200% c) 300%. d) 400%

Discussion

11233.	The work done to increase the from 30 m/s to 40 m/s, if the mass of the car is 1000 kg is (1) 350 J (3) 3.5 kJ (4) 3.5 J 31.) velocity of a car 2
Answer» The work done to increase the from 30 m/s to 40 m/s, if the mass of the car is 1000 kg is (1) 350 J (3) 3.5 kJ (4) 3.5 J 31.) velocity of a car 2

Discussion

11234.	A 0.1 Kg mass is suspended from a wire of negligible mass. The length of the wire is 1 m and its cross section area is 4.9 ×10−7m2 . If the mass is pulled a little in the vertically downward and released , it performs simple harmonic motion of angular frequency 140 rad s−1 . If the young's modulus of the material of the wire is n×109Nm−2 , the value of n is
Answer» A 0.1 Kg mass is suspended from a wire of negligible mass. The length of the wire is 1 m and its cross section area is 4.9 $\times 10^{- 7} m^{2}$ . If the mass is pulled a little in the vertically downward and released , it performs simple harmonic motion of angular frequency 140 rad $s^{- 1}$ . If the young's modulus of the material of the wire is $n \times 10^{9} N m^{- 2}$ , the value of $n$ is

Discussion

11235.	The aperture diameter of a telescope is 5 m. The separation between the moon and the earth is 4×105 km. With light of wavelength of 5500 ˚A, the minimum separation between objects on the surface of the moon, so that they are just resolved, is close to:
Answer» The aperture diameter of a telescope is $5 m$ . The separation between the moon and the earth is $4 \times 10^{5} km$ . With light of wavelength of $5500 ˚ A$ , the minimum separation between objects on the surface of the moon, so that they are just resolved, is close to:

Discussion

11236.	In the arrangement shown in the figure, the coefficient of friction between the two blocks is μ=0.5 and the surface is smooth. The force of friction acting between the two blocks is
Answer» In the arrangement shown in the figure, the coefficient of friction between the two blocks is $μ = 0.5$ and the surface is smooth. The force of friction acting between the two blocks is

Discussion

11237.	Monochromatic light of wavelength 589 nm is incident from air on awater surface. What are the wavelength, frequency and speed of(a) reflected, and (b) refracted light? Refractive index of water is1.33.
Answer» Monochromatic light of wavelength 589 nm is incident from air on awater surface. What are the wavelength, frequency and speed of(a) reflected, and (b) refracted light? Refractive index of water is1.33.

Discussion

11238.	Four ppint masses reach of value m are placed at corners of a square ABCD of side l.The moment of inertia of this system about an axis through A and parallel to BD is =?
Answer» Four ppint masses reach of value m are placed at corners of a square ABCD of side l.The moment of inertia of this system about an axis through A and parallel to BD is =?

Discussion

11239.	A particle moves in a plane along an elliptical path given by x29+y24=1. At point (0,2), x - component of velocity is 9 m/s. The magnitude of y - component of acceleration at this point is
Answer» A particle moves in a plane along an elliptical path given by $\frac{x^{2}}{9} + \frac{y^{2}}{4} = 1$ . At point $(0, 2)$ , x - component of velocity is $9 m / s$ . The magnitude of y - component of acceleration at this point is

Discussion

11240.	In the above question, if the motion of the pulse and rotation of the loop, both are in same direction then the velocity of the pulse with respect to ground will be:
Answer» In the above question, if the motion of the pulse and rotation of the loop, both are in same direction then the velocity of the pulse with respect to ground will be:

Discussion

11241.	A 12 ohm non insulated resistance wire is bent in the middle by 180° and both the halves are twisted with each other.What will be its new resistance?
Answer» A 12 ohm non insulated resistance wire is bent in the middle by 180° and both the halves are twisted with each other.What will be its new resistance?

Discussion

11242.	Consider the circuit shown in the figure below. (λ=0) Values of V1=6V and V2=2V. Value of IDThe two transistors Q1 and Q2 are exactly matched with each other.μnCoxWL=10 mA/V2,Vt=0.5V(λ=0) Values of V1=6V and V2=2V. Value of ID in mA is 11.25
Answer» $C o n s i d e r t h e c i r c u i t s h o w n i n t h e f i g u r e b e l o w .$ $(λ = 0) V a l u e s o f V_{1} = 6 V a n d V_{2} = 2 V . V a l u e o f I_{D}$ $The two transistors Q_{1} and Q_{2} are exactly matched with each other. \frac{μ_{n} C_{o x} W}{L} = 10 {mA/V}^{2}, V_{t} = 0.5 V$ ( $λ = 0) V a l u e s o f V_{1} = 6 V a n d V_{2} = 2 V . V a l u e o f I_{D} i n m A i s$ 11.25

Discussion

11243.	The resultant of two velocity vectors →A and →B is perpendicular to →A. Magnitude of resultant (→R) is equal to half of magnitude of →B. Find the angle between →A and →B
Answer» The resultant of two velocity vectors $\to A$ and $\to B$ is perpendicular to $\to A$ . Magnitude of resultant $(\to R)$ is equal to half of magnitude of $\to B$ . Find the angle between $\to A$ and $\to B$

Discussion

11244.	ntAn electron dipole each point charge of mass m and magnitude of charge q have total length 2a.If it is displaced at very small angle thetain external field it will ocillate with frequencyn
Answer» ntAn electron dipole each point charge of mass m and magnitude of charge q have total length 2a.If it is displaced at very small angle thetain external field it will ocillate with frequencyn

Discussion

11245.	If U1,U2,U3 represent the potential energy differences for moving a particle from A to B along three different paths 1,2 & 3 (as shown in the figure) in the gravitational field of point mass m, find the correct relation between U1,U2 & U3.
Answer» If $U_{1}, U_{2}, U_{3}$ represent the potential energy differences for moving a particle from $A$ to $B$ along three different paths $1, 2 & 3$ (as shown in the figure) in the gravitational field of point mass $m$ , find the correct relation between $U_{1}, U_{2} & U_{3}$ .

Discussion

11246.	A conducting wire has a resistance of 10 Ω at 0∘C and its coefficient of thermal resistance is α=1273/∘C. The resistance of wire at a temperature 273∘C will be(lne=1)
Answer» A conducting wire has a resistance of $10 Ω$ at $0^{\circ} C$ and its coefficient of thermal resistance is $α = \frac{1}{273} /^{\circ} C$ . The resistance of wire at a temperature $273^{\circ} C$ will be ( $ln e = 1$ )

Discussion

11247.	A uniform rod of length l is free to rotate in a vertical plane about a fixed horizontal axis passing through O. The rod is allowed to rotate from rest, from its unstable vertical position. Find the angular velocity of the rod when it has turned through an angle θ as shown.
Answer» A uniform rod of length $l$ is free to rotate in a vertical plane about a fixed horizontal axis passing through $O$ . The rod is allowed to rotate from rest, from its unstable vertical position. Find the angular velocity of the rod when it has turned through an angle $θ$ as shown.

Discussion

11248.	why there is linear relationship between different scales of temperature?
Answer» why there is linear relationship between different scales of temperature?

Discussion

11249.	87. Two point masses m are kept r distance apart . What will be the potential at 0.25r distance from any one mass towards the other mass?
Answer» 87. Two point masses m are kept r distance apart . What will be the potential at 0.25r distance from any one mass towards the other mass?

Discussion

11250.	at what distance should an object be placed from a convex lens of focal length 18cm to obtain an image of 24cm from it on other side. what will be the magnification produced in this case. Draw the ray diagram?
Answer» at what distance should an object be placed from a convex lens of focal length 18cm to obtain an image of 24cm from it on other side. what will be the magnification produced in this case. Draw the ray diagram?

Discussion

Explore topic-wise InterviewSolutions in .

For the arrangement in figure: The elongation in spring in equilibrium condition is [take g=10 m/s2]

Determine the electric field strength vector if the potential of this field depends on x,y coordinates as V=10axy.

Why a spark gap is left while making emp jammers

The power radiated by a black body is P and it radiates maximum energy around wavelength λ∘. If the temperature of the black body is now changed so that it radiates maximum energy around a wavelength 3λ∘/4, the power radiated by it will increase by a factor of

Ashell of mass 0.020 kg is fired by a gun of mass 100 kg. If themuzzle speed of the shell is 80 ms–1,what is the recoil speed of the gun?

If a proton enters a region of uniform magnetic field with velocity v in a direction perpendicular to the magnetic field, then the time period of revolution is T. If proton enters with velocity 2v, the time period will be

A block of mass 10 kg is attached to the end of two light spring balances combination as shown in figure. What mass will each spring reads? (assume springs are collaborated so that its reading provides the mass)

dispersive power of prism why not depend upon size and angle of prism as the formula of dispersive power derive we use min.deviation=(μ-1)A is only applicable for small angle of pris

63. An electric dipole is situated in an electric field of uniform intensity E whose dipole moment is P and moment of inertia is I . If the dipole is displaced then the angular frequency of its oscillation is ??

A solid sphere is rolling purely on a rough horizontal surface (coefficient of kinetic friction = μ) with speed of centre u, as shown in the figure. It collides with a smooth vertical wall, the coefficient of restitution being ½. Choose the correct options.

Which is not true for three phase AC?

The resistance of a wire is R. If it is stretched such that its length becomes n times its initial length, what will be the final resistance of the same wire?

A wire is bent in the form of a circular arc with a straight portion AB. Magnetic field at O when current I is flowing in the wire is

For the given uniformly charged semi-circular ring, electric field at the centre is

Four charges each equal to Q are placed at thefour corners of a square and a charge q is placed at the centre of the square. If the system is in equilibrium then the value of q is

A machine gun mounted on a 2000kg car , on a horizontal frictionless surface fires 10 bullets per second . If the mass of each bullet is 10g and 5he velocity of each bullet is 500m/s , then the acceleration of the car will be ?

A red LED emits light at 0.1 Watt uniformly around it. The amplitude of the electric field of the light at a distance of 1 m from the diode is

Simplify (2root3) (3+root5)??

28.If charges q/2 and 2q are placed at the center of face and at the corner of a cube, then the total flux through the cube will be a. q/ 2Eo b. q/Eo c. q/ 6Eo d. q/8Eo (Eo -epsilon)

15.Figure shows the practical realisation of a logic gate.identify the gate?

Two identical wires are used to make toroids A and B of cross-sectional radius a and b respectively. Average radii of toroid A and B are r and 2r respectively. Find the ratio of magnetic field of A and B, if they are connected across a battery of emf E and 3E respectively.[ wire is closely wounded]

In the figure shown below, coefficient of friction between the 3 kg block and ground varies with time and force acting on the block is given by F=5t. Then, work done by the friction force on the 2 kg block upto 5 sec, from the frame of reference of the 3 kg block is: [Take g=10 m/s2]

Electric charges of 1 μC,−1 μC and 2 μC are placed in air at the corners A,B and C respectively of an equilateral triangle ABC having length of each side 10 cm. The resultant force on the charge at C is

How many maximum possible spectral lines are formed if electron is present in 6th shell

From where gravity origins

6. If the distance b/w two bodies is i creased by a factor of 5 by what factor would the mass of one of them have to be altered to maintain the same gravitational force ?would this be an Increase or decrease in the mass

If the vectors →a and →b are linearly independent satisfying (√3tanθ+1)→a+(√3secθ−2)→b=→0, then the general values of θ is

19. If the error in the measurement of momentum of a particle is (+100%) then the error in the measurement of kinetic energy is: a) 100%. b) 200% c) 300%. d) 400%

The work done to increase the from 30 m/s to 40 m/s, if the mass of the car is 1000 kg is (1) 350 J (3) 3.5 kJ (4) 3.5 J 31.) velocity of a car 2

The aperture diameter of a telescope is 5 m. The separation between the moon and the earth is 4×105 km. With light of wavelength of 5500 ˚A, the minimum separation between objects on the surface of the moon, so that they are just resolved, is close to:

In the arrangement shown in the figure, the coefficient of friction between the two blocks is μ=0.5 and the surface is smooth. The force of friction acting between the two blocks is

Monochromatic light of wavelength 589 nm is incident from air on awater surface. What are the wavelength, frequency and speed of(a) reflected, and (b) refracted light? Refractive index of water is1.33.

Four ppint masses reach of value m are placed at corners of a square ABCD of side l.The moment of inertia of this system about an axis through A and parallel to BD is =?

A particle moves in a plane along an elliptical path given by x29+y24=1. At point (0,2), x - component of velocity is 9 m/s. The magnitude of y - component of acceleration at this point is

In the above question, if the motion of the pulse and rotation of the loop, both are in same direction then the velocity of the pulse with respect to ground will be:

A 12 ohm non insulated resistance wire is bent in the middle by 180° and both the halves are twisted with each other.What will be its new resistance?

Consider the circuit shown in the figure below. (λ=0) Values of V1=6V and V2=2V. Value of IDThe two transistors Q1 and Q2 are exactly matched with each other.μnCoxWL=10 mA/V2,Vt=0.5V(λ=0) Values of V1=6V and V2=2V. Value of ID in mA is 11.25

The resultant of two velocity vectors →A and →B is perpendicular to →A. Magnitude of resultant (→R) is equal to half of magnitude of →B. Find the angle between →A and →B

ntAn electron dipole each point charge of mass m and magnitude of charge q have total length 2a.If it is displaced at very small angle thetain external field it will ocillate with frequencyn

If U1,U2,U3 represent the potential energy differences for moving a particle from A to B along three different paths 1,2 &amp; 3 (as shown in the figure) in the gravitational field of point mass m, find the correct relation between U1,U2 &amp; U3.

A conducting wire has a resistance of 10 Ω at 0∘C and its coefficient of thermal resistance is α=1273/∘C. The resistance of wire at a temperature 273∘C will be(lne=1)

A uniform rod of length l is free to rotate in a vertical plane about a fixed horizontal axis passing through O. The rod is allowed to rotate from rest, from its unstable vertical position. Find the angular velocity of the rod when it has turned through an angle θ as shown.

why there is linear relationship between different scales of temperature?

87. Two point masses m are kept r distance apart . What will be the potential at 0.25r distance from any one mass towards the other mass?

at what distance should an object be placed from a convex lens of focal length 18cm to obtain an image of 24cm from it on other side. what will be the magnification produced in this case. Draw the ray diagram?

If U1,U2,U3 represent the potential energy differences for moving a particle from A to B along three different paths 1,2 & 3 (as shown in the figure) in the gravitational field of point mass m, find the correct relation between U1,U2 & U3.