50278 + Interview Questions in Physics Page 318 InterviewSolution

15851.	If two spheres of different radii have equal charge, then the potential will be
Answer» If two spheres of different radii have equal charge, then the potential will be

Discussion

15852.	A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45∘, the speed of the car is: Take g=10 m/s2
Answer» A car of mass $1000 kg$ negotiates a banked curve of radius $90 m$ on a frictionless road. If the banking angle is $45^{\circ}$ , the speed of the car is: Take $g = 10 {m/s}^{2}$

Discussion

15853.	The momentum of a photon having energy equal to the rest energy of an electron is 1 zero _22 2 2.73 x 10 kg m/s 3 infinite _24 4 1.99 x 10 kg m/s
Answer» The momentum of a photon having energy equal to the rest energy of an electron is 1 zero _22 2 2.73 x 10 kg m/s 3 infinite _24 4 1.99 x 10 kg m/s

Discussion

15854.	A particle of mass m is projected from horizontal ground with an initial velocity of u making an angle θ with horizontal. The angular momentum of the particle about the point of projection, when it just strikes the ground, is -
Answer» A particle of mass $m$ is projected from horizontal ground with an initial velocity of $u$ making an angle $θ$ with horizontal. The angular momentum of the particle about the point of projection, when it just strikes the ground, is -

Discussion

15855.	A potentiometer wire of length 10 m and resistance 30 ohm is connected in series with a battery of emf 2.5 V, internal resistance 5 ohm and external resistance R. If the fall of potential along the potentiometer wire is 50 mV/m the value of R in Ω is
Answer» A potentiometer wire of length $10 m$ and resistance $30 ohm$ is connected in series with a battery of emf $2.5 V$ , internal resistance $5 ohm$ and external resistance $R$ . If the fall of potential along the potentiometer wire is $50 mV/m$ the value of $R$ in $Ω$ is

Discussion

15856.	If i=0.25 A. in the figure, then the value of R is
Answer» If $i = 0.25 A$ . in the figure, then the value of $R$ is

Discussion

15857.	2In Fraunhofer diffraction, the wavelength of light incident normally on the slit iswhere d is the width of the slit. What will be the number of bright fringes formed onan infinitely extended screen placed at any distance from the slit.
Answer» 2In Fraunhofer diffraction, the wavelength of light incident normally on the slit iswhere d is the width of the slit. What will be the number of bright fringes formed onan infinitely extended screen placed at any distance from the slit.

Discussion

15858.	Calculate the amount of charge on capacitor of 4 μF. The internal resistance of battery is 1 Ω :
Answer» Calculate the amount of charge on capacitor of $4 μ F$ . The internal resistance of battery is $1 Ω$ :

Discussion

15859.	Consider the stress- strain curve for an ideal elastic-plastic strain hardening metal as shown in the figure. The metal was loaded in uniaxial tension starting from O. Upon loading, the stress-strain curve passes through initial yield point at P, and then strain hardens to point Q, where the loading was stopped. From point Q, the specimen was unloaded to point R, where the stress is zero. If the same specimen is reloaded in tension from point R, the value of stress at which the material yields again is MPa
Answer» Consider the stress- strain curve for an ideal elastic-plastic strain hardening metal as shown in the figure. The metal was loaded in uniaxial tension starting from O. Upon loading, the stress-strain curve passes through initial yield point at P, and then strain hardens to point Q, where the loading was stopped. From point Q, the specimen was unloaded to point R, where the stress is zero. If the same specimen is reloaded in tension from point R, the value of stress at which the material yields again is MPa

Discussion

15860.	Find tension in the left and the right string?
Answer» Find tension in the left and the right string?

15860.

Find tension in the left and the right string?

Answer»

Find tension in the left and the right string?

Discussion

15861.	Figure shows the Distance-Time graph of an object. Calculate the following:(i) Average speed in the first 6 s.(ii) Distance travelled at the end of 10 s.(iii) Speed at t = 2 s, and at t = 6 s [5 MARKS]
Answer» Figure shows the Distance-Time graph of an object. Calculate the following: (i) Average speed in the first 6 s. (ii) Distance travelled at the end of 10 s. (iii) Speed at t = 2 s, and at t = 6 s [5 MARKS]

Discussion

15862.	2.When the block of mass m moves then the wedge of mass M moves in backward direction. Find the velocity of wedge in backward direction.
Answer» 2.When the block of mass m moves then the wedge of mass M moves in backward direction. Find the velocity of wedge in backward direction.

Discussion

15863.	A shell of mass m at rest explodes in two parts with mass ratio 1:2. The surface has friction coefficient μ. What is the ratio of stopping distance
Answer» A shell of mass m at rest explodes in two parts with mass ratio 1:2. The surface has friction coefficient $μ$ . What is the ratio of stopping distance

15863.

A shell of mass m at rest explodes in two parts with mass ratio 1:2. The surface has friction coefficient μ. What is the ratio of stopping distance

Answer»

A shell of mass m at rest explodes in two parts with mass ratio 1:2. The surface has friction coefficient $μ$ . What is the ratio of stopping distance

Discussion

15864.	Two particles P and Q describe SHM of same amplitude a and frequency v along the same straight line. The maximum distance between two particles is √2 a. The initial phase difference between particles is:
Answer» Two particles P and Q describe SHM of same amplitude a and frequency v along the same straight line. The maximum distance between two particles is $\sqrt{2}$ a. The initial phase difference between particles is:

Discussion

15865.	Four wires of identical length, diameters and of the same material are stretched on a sonometre wire. If the ratio of their tensions is 1 : 4 : 9 : 16, then the ratio of their fundamental frequencies are:
Answer» Four wires of identical length, diameters and of the same material are stretched on a sonometre wire. If the ratio of their tensions is 1 : 4 : 9 : 16, then the ratio of their fundamental frequencies are:

Discussion

15866.	The magnetic field due to the earth has a horizontal component of 26μ T at a place where the dip is 600. Find the vertical component and the magnitude of the field.
Answer» The magnetic field due to the earth has a horizontal component of $26 μ$ T at a place where the dip is $60^{0}$ . Find the vertical component and the magnitude of the field.

Discussion

15867.	The angular velocity of the earth with which it has to rotate so that acceleration due to gravity on 60o latitude becomes zero is (Radius of earth = 640 km. At the poles g=10ms−2)
Answer» The angular velocity of the earth with which it has to rotate so that acceleration due to gravity on $60^{o}$ latitude becomes zero is (Radius of earth = 640 km. At the poles g=10 $m s^{- 2}$ )

Discussion

15868.	A person travels 100 km in the North direction and then turns right and travels 100 km. Consider the starting point as origin, North direction as positive y direction and East direction as positive x direction. The final position of the person is
Answer» A person travels $100 km$ in the North direction and then turns right and travels $100 km$ . Consider the starting point as origin, North direction as positive $y$ direction and East direction as positive $x$ direction. The final position of the person is

Discussion

15869.	A particle is executing SHM according to the equation, x=Acosωt. Average speed of the particle during the interval 0≤t≤π6ω is
Answer» A particle is executing SHM according to the equation, $x = A cos ω t$ . Average speed of the particle during the interval $0 \leq t \leq \frac{π}{6 ω}$ is

Discussion

15870.	A saturated solution of AgA (Ksp= 310raise to the power -14) & AgB (Ksp= 110raise to the power -14) has conductivity 375* 10 raise to the power -10 S/cm & the LMC Ag+ = 60 & A- = 80. find LMC of B- .
Answer» A saturated solution of AgA (Ksp= 310raise to the power -14) & AgB (Ksp= 110raise to the power -14) has conductivity 375* 10 raise to the power -10 S/cm & the LMC Ag+ = 60 & A- = 80. find LMC of B- .

Discussion

15871.	2A body is initially at rest. It undergoes onedimensional motion with constant acceleration. Thepower delivered to it at time t is proportional to1(1) t2(2) t3(3) t2(4)
Answer» 2A body is initially at rest. It undergoes onedimensional motion with constant acceleration. Thepower delivered to it at time t is proportional to1(1) t2(2) t3(3) t2(4)

Discussion

15872.	Find \|→a−→b\|, if two vectors →a and →b are such that \|→a\|=2, \|→b\|=3 and →a.→b=4
Answer» Find $\| \to a - \to b \|$ , if two vectors $\to a$ and $\to b$ are such that $\| \to a \| = 2$ , $\| \to b \| = 3$ and $\to a . \to b = 4$

Discussion

15873.	A trolley of mass 300 kg carrying a sandbag of 25 kg is moving uniformly with a speed of 27 km/h on a frictionless track. After a while, sand starts leaking out of a hole on the floor of the trolley at the rate of 0.05 kg s–1. What is the speed of the trolley after the entire sand bag is empty?
Answer» A trolley of mass 300 kg carrying a sandbag of 25 kg is moving uniformly with a speed of 27 km/h on a frictionless track. After a while, sand starts leaking out of a hole on the floor of the trolley at the rate of 0.05 kg s^–1. What is the speed of the trolley after the entire sand bag is empty?

Discussion

15874.	In the given circuit, the potential difference between A and B in the steady state is
Answer» In the given circuit, the potential difference between $A$ and $B$ in the steady state is

Discussion

15875.	A body of mass m kg starts falling from a point 2R above the earth's surface. Its kinetic energy when it has fallen to a point R above the earth's surface will be
Answer» A body of mass $m kg$ starts falling from a point $2 R$ above the earth's surface. Its kinetic energy when it has fallen to a point $R$ above the earth's surface will be

Discussion

15876.	The angular position of one of the blades of a fan is θ1=π3 rad, as shown in the figure. If the fan is switched on and off within a fraction of a second, the blade’s angular position changes to θ2=π2 rad. The angular displacement of all the blades is
Answer» The angular position of one of the blades of a fan is $θ_{1} = \frac{π}{3} rad$ , as shown in the figure. If the fan is switched on and off within a fraction of a second, the blade’s angular position changes to $θ_{2} = \frac{π}{2} rad$ . The angular displacement of all the blades is

Discussion

15877.	The core of a toroid having 3000 turns has inner and outer radial 11 cm and 12 cm respectively. The magnetic field in the core for a current of 0.7 A is 2.5 T. Calculate the relative permeability of the core ?
Answer» The core of a toroid having $3000$ turns has inner and outer radial $11 cm$ and $12 cm$ respectively. The magnetic field in the core for a current of $0.7 A$ is $2.5 T$ . Calculate the relative permeability of the core ?

Discussion

15878.	Three capacitors each of capacitance C and of breakdown voltage V are joined in series. The capacitance and breakdown voltage of the combination will be
Answer» Three capacitors each of capacitance $C$ and of breakdown voltage $V$ are joined in series. The capacitance and breakdown voltage of the combination will be

Discussion

15879.	find the speed of particle(mass m which is released) crossing the centre of ring if it is root3R away fromcentre(take mass of ring =M radius R)
Answer» find the speed of particle(mass m which is released) crossing the centre of ring if it is root3R away fromcentre(take mass of ring =M radius R)

Discussion

15880.	The wavelength of maximum energy released during an atomic explosion was 2.93×1010m. Given that Wein's constant is 2.93×10−3 m-K, the maximum temperature attained must be of the order of
Answer» The wavelength of maximum energy released during an atomic explosion was $2.93 \times 10^{10} m$ . Given that Wein's constant is $2.93 \times 10^{- 3}$ m-K, the maximum temperature attained must be of the order of

15880.

The wavelength of maximum energy released during an atomic explosion was 2.93×1010m. Given that Wein's constant is 2.93×10−3 m-K, the maximum temperature attained must be of the order of

Answer»

The wavelength of maximum energy released during an atomic explosion was $2.93 \times 10^{10} m$ . Given that Wein's constant is $2.93 \times 10^{- 3}$ m-K, the maximum temperature attained must be of the order of

Discussion

15881.	18. why we use tan of theta in finding slope of any line not sine or cos of theta.
Answer» 18. why we use tan of theta in finding slope of any line not sine or cos of theta.

Discussion

15882.	A light rod with uniform cross-section of 10−4m2 is shown in the adjoining figure. The rod consists of three different materials whose lengths are 0.1 m, 0.2 m and 0.15 m respectively and whose Young's modulii are 2.5×1010Nm2,4×1010Nm2 and 1×1010Nm2 respectively.The displacement of point B will be
Answer» A light rod with uniform cross-section of $10^{- 4} m^{2}$ is shown in the adjoining figure. The rod consists of three different materials whose lengths are 0.1 m, 0.2 m and 0.15 m respectively and whose Young's modulii are $2.5 \times 10^{10} \frac{N}{m^{2}}, 4 \times 10^{10} \frac{N}{m^{2}}$ and $1 \times 10^{10} \frac{N}{m^{2}}$ respectively. The displacement of point B will be

Discussion

15883.	The resultant of →P and →Q is perpendicular to →P. What is the angle between →Pand→Q
Answer» The resultant of $\to P$ and $\to Q$ is perpendicular to $\to P$ . What is the angle between $\to P a n d \to Q$

Discussion

15884.	obtain the equation of the electric field at a point by system of "n" point charge
Answer» obtain the equation of the electric field at a point by system of "n" point charge

Discussion

15885.	The speed of a particle travelling in a circle of radius 20 cm increases uniformly from 6 m/s to 8 m/s in 4 sec. The angular acceleration of particle is :
Answer» The speed of a particle travelling in a circle of radius $20 cm$ increases uniformly from $6 m/s$ to $8 m/s$ in $4 sec$ . The angular acceleration of particle is :

Discussion

15886.	25.The inner wire of a straight coaxial cable has radius a while the outer wire has radii 3a and 5a. The cable carries equal and opposite currents of magnitude i (distributed uniformly across the cross-section) on the inner and outer wires (see figure).
Answer» 25.The inner wire of a straight coaxial cable has radius a while the outer wire has radii 3a and 5a. The cable carries equal and opposite currents of magnitude i (distributed uniformly across the cross-section) on the inner and outer wires (see figure).

Discussion

15887.	A silver ingot weighing 2.1 kg is held by a string so as to be completely immersed in a liquid of relative density 0.8. The relative density of silver is 10.5. The tension in the string in kg-wt is
Answer» A silver ingot weighing 2.1 kg is held by a string so as to be completely immersed in a liquid of relative density 0.8. The relative density of silver is 10.5. The tension in the string in kg-wt is

Discussion

15888.	the s†an dar enthalphy of formation of gaseous H2O at 298 K is -241kJpermole.estimate its value of 100^° c givenbthe following valuesvof molar haet capacities at △ p=0 H2O(g)=35.58 Jper K per mol ,H2=28.84,O2=29.3.Asume heat capacity to be independent of temperatur
Answer» the s†an dar enthalphy of formation of gaseous H2O at 298 K is -241kJpermole.estimate its value of 100^° c givenbthe following valuesvof molar haet capacities at △ p=0 H2O(g)=35.58 Jper K per mol ,H2=28.84,O2=29.3.Asume heat capacity to be independent of temperatur

Discussion

15889.	Two bodies of masses 1 kg and 3 kg have position vectors ^i+2j+k and −3^i−2^j+^k respectively. The centre of mass of this system has a position vector
Answer» Two bodies of masses $1$ $k g$ and $3$ $k g$ have position vectors $^i + 2 j + k and - 3^i - 2^j +^k$ respectively. The centre of mass of this system has a position vector

Discussion

15890.	A doped silicon wafer has a thickness of 0.5 mm and a Hall-coefficient of 2×10−2m3/C. If the current through the wafer is 15 mA, then the magnitude of hall voltage for a magnetic flux density of 0.2 T is_______mV.120
Answer» A doped silicon wafer has a thickness of 0.5 mm and a Hall-coefficient of $2 \times 10^{- 2} m^{3} / C$ . If the current through the wafer is 15 mA, then the magnitude of hall voltage for a magnetic flux density of $0.2 T$ is_______mV. 120

Discussion

15891.	man walking with a speed of 2 km/h on a horizontal road, the rain appears to fall vertically.When he reverses his direction with same speed,it appears to meet him with a speed of 2/5 km/h.The actual direction of the rain is
Answer» man walking with a speed of 2 km/h on a horizontal road, the rain appears to fall vertically. When he reverses his direction with same speed, it appears to meet him with a speed of 2/5 km/h. The actual direction of the rain is

Discussion

15892.	Critical angle is minimum for which colour of VIBGYOR?
Answer» Critical angle is minimum for which colour of VIBGYOR?

Discussion

15893.	15.At low temperature, most molecules have A) Root Mean Square Velocity B) Average Velocity C) Most Probable Velocity D) All of these
Answer» 15.At low temperature, most molecules have A) Root Mean Square Velocity B) Average Velocity C) Most Probable Velocity D) All of these

Discussion

15894.	A lead bullet strikes a target with a velocity of 480ms−1. If the bullet falls dead, the rise in temperature of bullet (c = 0.03 cal/gram), assuming that heat produced is equally shared between the bullet and target is
Answer» A lead bullet strikes a target with a velocity of $480 m s^{- 1}$ . If the bullet falls dead, the rise in temperature of bullet (c = 0.03 cal/gram), assuming that heat produced is equally shared between the bullet and target is

Discussion

15895.	The angular frequency of a particle executing SHM about the origin is 10 rads−1 and it's amplitude is 0.2 m. If at t=0 the particle was at 0.1 m. What is the equation of it's motion?
Answer» The angular frequency of a particle executing SHM about the origin is $10 r a d s^{- 1}$ and it's amplitude is 0.2 m. If at t=0 the particle was at 0.1 m. What is the equation of it's motion?

Discussion

15896.	An ideal liquid is flowing in two pipes one is inclined and second is horizontal. Both the pipes are connected by two vertical tubes of length h1 and h2 as shown in fig. The flow is streamline in both the pipes. If velocity of liquid at A, B and C are 2 m/s, 4 m/s and 4 m/s respectively, the velocity at D will be
Answer» An ideal liquid is flowing in two pipes one is inclined and second is horizontal. Both the pipes are connected by two vertical tubes of length h1 and h2 as shown in fig. The flow is streamline in both the pipes. If velocity of liquid at A, B and C are 2 m/s, 4 m/s and 4 m/s respectively, the velocity at D will be

Discussion

15897.	Snow is falling vertically at a constant speed of 8.0 m/s. At what angle from the vertical do the snowflakes appear to be falling as viewed by the driver of a car traveling on a straight level road with a speed of 8√3 m/s?
Answer» Snow is falling vertically at a constant speed of $8.0 m/s$ . At what angle from the vertical do the snowflakes appear to be falling as viewed by the driver of a car traveling on a straight level road with a speed of $8 \sqrt{3} m/s$ ?

Discussion

15898.	81.At high temperatures and low pressure van derby Wales equation can be expressed as-
Answer» 81.At high temperatures and low pressure van derby Wales equation can be expressed as-

Discussion

15899.	six point charges are placed at the vertices of a hexagon of side 1 m .net field at the center of the hexagon i
Answer» six point charges are placed at the vertices of a hexagon of side 1 m .net field at the center of the hexagon i

Discussion

15900.	A rod of length l is moving A rod of length l is moving with a constant speed ′θ′ to the right as shown. An infinitely long wire is carrying a current i as shown: Find ϵind in the rod.
Answer» A rod of length l is moving A rod of length l is moving with a constant speed $^{'} θ^{'}$ to the right as shown. An infinitely long wire is carrying a current i as shown: Find $ϵ_{i n d}$ in the rod.

Discussion

Explore topic-wise InterviewSolutions in .

If two spheres of different radii have equal charge, then the potential will be

A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless road. If the banking angle is 45∘, the speed of the car is: Take g=10 m/s2

The momentum of a photon having energy equal to the rest energy of an electron is 1 zero _22 2 2.73 x 10 kg m/s 3 infinite _24 4 1.99 x 10 kg m/s

A particle of mass m is projected from horizontal ground with an initial velocity of u making an angle θ with horizontal. The angular momentum of the particle about the point of projection, when it just strikes the ground, is -

A potentiometer wire of length 10 m and resistance 30 ohm is connected in series with a battery of emf 2.5 V, internal resistance 5 ohm and external resistance R. If the fall of potential along the potentiometer wire is 50 mV/m the value of R in Ω is

If i=0.25 A. in the figure, then the value of R is

2In Fraunhofer diffraction, the wavelength of light incident normally on the slit iswhere d is the width of the slit. What will be the number of bright fringes formed onan infinitely extended screen placed at any distance from the slit.

Calculate the amount of charge on capacitor of 4 μF. The internal resistance of battery is 1 Ω :

Find tension in the left and the right string?

Figure shows the Distance-Time graph of an object. Calculate the following:(i) Average speed in the first 6 s.(ii) Distance travelled at the end of 10 s.(iii) Speed at t = 2 s, and at t = 6 s [5 MARKS]

2.When the block of mass m moves then the wedge of mass M moves in backward direction. Find the velocity of wedge in backward direction.

A shell of mass m at rest explodes in two parts with mass ratio 1:2. The surface has friction coefficient μ. What is the ratio of stopping distance

Two particles P and Q describe SHM of same amplitude a and frequency v along the same straight line. The maximum distance between two particles is √2 a. The initial phase difference between particles is:

Four wires of identical length, diameters and of the same material are stretched on a sonometre wire. If the ratio of their tensions is 1 : 4 : 9 : 16, then the ratio of their fundamental frequencies are:

The magnetic field due to the earth has a horizontal component of 26μ T at a place where the dip is 600. Find the vertical component and the magnitude of the field.

The angular velocity of the earth with which it has to rotate so that acceleration due to gravity on 60o latitude becomes zero is (Radius of earth = 640 km. At the poles g=10ms−2)

A person travels 100 km in the North direction and then turns right and travels 100 km. Consider the starting point as origin, North direction as positive y direction and East direction as positive x direction. The final position of the person is

A particle is executing SHM according to the equation, x=Acosωt. Average speed of the particle during the interval 0≤t≤π6ω is

A saturated solution of AgA (Ksp= 3*10raise to the power -14) & AgB (Ksp= 1*10raise to the power -14) has conductivity 375* 10 raise to the power -10 S/cm & the LMC Ag+ = 60 & A- = 80. find LMC of B- .

2A body is initially at rest. It undergoes onedimensional motion with constant acceleration. Thepower delivered to it at time t is proportional to1(1) t2(2) t3(3) t2(4)

Find |→a−→b|, if two vectors →a and →b are such that |→a|=2, |→b|=3 and →a.→b=4

A trolley of mass 300 kg carrying a sandbag of 25 kg is moving uniformly with a speed of 27 km/h on a frictionless track. After a while, sand starts leaking out of a hole on the floor of the trolley at the rate of 0.05 kg s–1. What is the speed of the trolley after the entire sand bag is empty?

In the given circuit, the potential difference between A and B in the steady state is

A body of mass m kg starts falling from a point 2R above the earth's surface. Its kinetic energy when it has fallen to a point R above the earth's surface will be

The angular position of one of the blades of a fan is θ1=π3 rad, as shown in the figure. If the fan is switched on and off within a fraction of a second, the blade’s angular position changes to θ2=π2 rad. The angular displacement of all the blades is

The core of a toroid having 3000 turns has inner and outer radial 11 cm and 12 cm respectively. The magnetic field in the core for a current of 0.7 A is 2.5 T. Calculate the relative permeability of the core ?

Three capacitors each of capacitance C and of breakdown voltage V are joined in series. The capacitance and breakdown voltage of the combination will be

find the speed of particle(mass m which is released) crossing the centre of ring if it is root3R away fromcentre(take mass of ring =M radius R)

The wavelength of maximum energy released during an atomic explosion was 2.93×1010m. Given that Wein's constant is 2.93×10−3 m-K, the maximum temperature attained must be of the order of

18. why we use tan of theta in finding slope of any line not sine or cos of theta.

The resultant of →P and →Q is perpendicular to →P. What is the angle between →Pand→Q

obtain the equation of the electric field at a point by system of "n" point charge

The speed of a particle travelling in a circle of radius 20 cm increases uniformly from 6 m/s to 8 m/s in 4 sec. The angular acceleration of particle is :

25.The inner wire of a straight coaxial cable has radius a while the outer wire has radii 3a and 5a. The cable carries equal and opposite currents of magnitude i (distributed uniformly across the cross-section) on the inner and outer wires (see figure).

A silver ingot weighing 2.1 kg is held by a string so as to be completely immersed in a liquid of relative density 0.8. The relative density of silver is 10.5. The tension in the string in kg-wt is

the s†an dar enthalphy of formation of gaseous H2O at 298 K is -241kJpermole.estimate its value of 100^° c givenbthe following valuesvof molar haet capacities at △ p=0 H2O(g)=35.58 Jper K per mol ,H2=28.84,O2=29.3.Asume heat capacity to be independent of temperatur

Two bodies of masses 1 kg and 3 kg have position vectors ^i+2j+k and −3^i−2^j+^k respectively. The centre of mass of this system has a position vector

A doped silicon wafer has a thickness of 0.5 mm and a Hall-coefficient of 2×10−2m3/C. If the current through the wafer is 15 mA, then the magnitude of hall voltage for a magnetic flux density of 0.2 T is_______mV.120

man walking with a speed of 2 km/h on a horizontal road, the rain appears to fall vertically.When he reverses his direction with same speed,it appears to meet him with a speed of 2/5 km/h.The actual direction of the rain is

Critical angle is minimum for which colour of VIBGYOR?

15.At low temperature, most molecules have A) Root Mean Square Velocity B) Average Velocity C) Most Probable Velocity D) All of these

A lead bullet strikes a target with a velocity of 480ms−1. If the bullet falls dead, the rise in temperature of bullet (c = 0.03 cal/gram), assuming that heat produced is equally shared between the bullet and target is

The angular frequency of a particle executing SHM about the origin is 10 rads−1 and it's amplitude is 0.2 m. If at t=0 the particle was at 0.1 m. What is the equation of it's motion?

Snow is falling vertically at a constant speed of 8.0 m/s. At what angle from the vertical do the snowflakes appear to be falling as viewed by the driver of a car traveling on a straight level road with a speed of 8√3 m/s?

81.At high temperatures and low pressure van derby Wales equation can be expressed as-

six point charges are placed at the vertices of a hexagon of side 1 m .net field at the center of the hexagon i

A rod of length l is moving A rod of length l is moving with a constant speed ′θ′ to the right as shown. An infinitely long wire is carrying a current i as shown: Find ϵind in the rod.

A saturated solution of AgA (Ksp= 310raise to the power -14) & AgB (Ksp= 110raise to the power -14) has conductivity 375* 10 raise to the power -10 S/cm & the LMC Ag+ = 60 & A- = 80. find LMC of B- .