50278 + Interview Questions in Physics Page 293 InterviewSolution

14601.	The displacement of the point of the wheel initially in contact with the ground, when the wheel rolls forward half a revolution will be (radius of the wheel is R)
Answer» The displacement of the point of the wheel initially in contact with the ground, when the wheel rolls forward half a revolution will be (radius of the wheel is $R$ )

Discussion

14602.	The transfer function of DT feedback system is H(z)=P1+P(zz−0.9)The range of P, for which the system is stable will be
Answer» The transfer function of DT feedback system is $H (z) = \frac{P}{1 + P (\frac{z}{z - 0.9})}$ The range of P, for which the system is stable will be

Discussion

14603.	A network of resistances is constructed with R1 and R2 as shown in the figure. The potential at the points 1, 2, 3 … n are V1,V2,V3,…Vn respectively, each having a potential k times smaller than the previous one.The current that passes through the resistance R2 nearest to the Vα is
Answer» A network of resistances is constructed with $R_{1}$ and $R_{2}$ as shown in the figure. The potential at the points 1, 2, 3 … n are $V_{1}, V_{2}, V_{3}, \dots V_{n}$ respectively, each having a potential k times smaller than the previous one. The current that passes through the resistance $R_{2}$ nearest to the $V_{α}$ is

Discussion

14604.	if the angle is 180, then why will torque be zero? because the body will try to rotate itself
Answer» if the angle is 180, then why will torque be zero? because the body will try to rotate itself

Discussion

14605.	A pendulum bob has a speed 3m/swhile passing through its lowest position. What is its speed when it makes on angle of 60∘ with the vertical? The length of the pendulum is 0.5m. Take g = 10 m/s2.
Answer» A pendulum bob has a speed 3m/swhile passing through its lowest position. What is its speed when it makes on angle of $60^{\circ}$ with the vertical? The length of the pendulum is 0.5m. Take g = 10 m/ $s^{2}$ .

Discussion

14606.	123.The linear charge density on the circumference of a circle of radius A varies as d=dcos theta . The total charge on it is?
Answer» 123.The linear charge density on the circumference of a circle of radius A varies as d=dcos theta . The total charge on it is?

Discussion

14607.	Two springs A and B have force constants k1 and k2 respectively. The ratio of work done on A to that done on B when they are stretched by the same force is
Answer» Two springs A and B have force constants $k_{1}$ and $k_{2}$ respectively. The ratio of work done on A to that done on B when they are stretched by the same force is

Discussion

14608.	Unpolarized light of intensity 32 Wm−2 passes through three polarizers such that transmission axes of the first and second polarizer makes an angle 30∘ with each other and the transmission axis of the last polarizer makes an angle θ with the axis of second polarizer as shown in figure. The intensity of final emerging light will be-
Answer» Unpolarized light of intensity $32 {Wm}^{- 2}$ passes through three polarizers such that transmission axes of the first and second polarizer makes an angle $30^{\circ}$ with each other and the transmission axis of the last polarizer makes an angle $θ$ with the axis of second polarizer as shown in figure. The intensity of final emerging light will be-

Discussion

14609.	Three resonant frequencies of a string are 90, 150 and 210 Hz. (a) Find the highest possible fundamental frequency of vibration of this string. (b) Which harmonics of the fundamental are the given frequencies ? (c) Which overtones are these frequencies ? (d) If the length of the string is 80 cm, what would be the speed of a transverse wave on this string ?
Answer» Three resonant frequencies of a string are 90, 150 and 210 Hz. (a) Find the highest possible fundamental frequency of vibration of this string. (b) Which harmonics of the fundamental are the given frequencies ? (c) Which overtones are these frequencies ? (d) If the length of the string is 80 cm, what would be the speed of a transverse wave on this string ?

Discussion

14610.	if the radius of earth shrinks by 2% ,mass remaining constant,then how would the value of acceleration due to gravity change. witn simple method
Answer» if the radius of earth shrinks by 2% ,mass remaining constant,then how would the value of acceleration due to gravity change. witn simple method

Discussion

14611.	mass of carbon anode consumed giving only co2 in the production of 270 kg of Al metal from bauxite by Hall process is (i)180 kg (ii)270 kg (iii)540 kg (iv)90 k
Answer» mass of carbon anode consumed giving only co2 in the production of 270 kg of Al metal from bauxite by Hall process is (i)180 kg (ii)270 kg (iii)540 kg (iv)90 k

Discussion

14612.	Potentiometer wire length is 10 m, having a total resistance of 10 Ω. If a battery of emf 2 V (of negligible internal resistance) and a rheostat are connected to it then the potential gradient is 2 mV m−1. Find the resistance imparted through the rheostat:
Answer» Potentiometer wire length is $10 m$ , having a total resistance of $10 Ω$ . If a battery of emf $2 V$ (of negligible internal resistance) and a rheostat are connected to it then the potential gradient is $2 {mV m}^{- 1}$ . Find the resistance imparted through the rheostat:

Discussion

14613.	A voltage source having the Laplace transform s2+3s+22s2+6s+5 is applied across a 2 H inductor having zero intial current. The current in the inductor at t=∞ is ___ A. (Answer upto two decimal places)0.2
Answer» A voltage source having the Laplace transform $\frac{s^{2} + 3 s + 2}{2 s^{2} + 6 s + 5}$ is applied across a 2 H inductor having zero intial current. The current in the inductor at $t = \infty$ is ___ A. (Answer upto two decimal places) 0.2

Discussion

14614.	if in a stationary wave the amplitude of antinode is 4 cm then amplitude corresponding to a particle of medium located exactly Midway between a node and antinode is
Answer» if in a stationary wave the amplitude of antinode is 4 cm then amplitude corresponding to a particle of medium located exactly Midway between a node and antinode is

Discussion

14615.	A second's pendulum is placed in a space laboratory orbiting around the earth at a height 3R, where R is the radius of the earth. The time period of the pendulum is
Answer» A second's pendulum is placed in a space laboratory orbiting around the earth at a height 3R, where R is the radius of the earth. The time period of the pendulum is

14615.

A second's pendulum is placed in a space laboratory orbiting around the earth at a height 3R, where R is the radius of the earth. The time period of the pendulum is

Answer»

A second's pendulum is placed in a space laboratory orbiting around the earth at a height 3R, where R is the radius of the earth. The time period of the pendulum is

Discussion

14616.	Light of wavelength 0.6μm from a sodium lamp falls on a photo cell and causes the emission of photoelectrons for which the stopping potential is 0.5V with light of wavelength 0.4μm from a sodium lamp, the stopping potential is 1.5V, with this data the value of heis:
Answer» Light of wavelength $0.6 μ m$ from a sodium lamp falls on a photo cell and causes the emission of photoelectrons for which the stopping potential is 0.5V with light of wavelength $0.4 μ m$ from a sodium lamp, the stopping potential is 1.5V, with this data the value of $\frac{h}{e}$ is:

Discussion

14617.	4.Two metallic spheres of radii r and 3r placed far away from each other,carry charges 3q and q respectively. They are now connected by a thin conducting wire. Cjarge on smaller sphere in electrostatic equilibrium is
Answer» 4.Two metallic spheres of radii r and 3r placed far away from each other,carry charges 3q and q respectively. They are now connected by a thin conducting wire. Cjarge on smaller sphere in electrostatic equilibrium is

Discussion

14618.	What is the average thermal energy of a diatomic gas? And what is thermal energy?
Answer» What is the average thermal energy of a diatomic gas? And what is thermal energy?

Discussion

14619.	The radius of curvature of a concave mirror is 24 cm and the image is magnified by 1.5 times. The object distance is???
Answer» The radius of curvature of a concave mirror is 24 cm and the image is magnified by 1.5 times. The object distance is???

Discussion

14620.	A cannon on a level plain is aimed at an angle α above the horizontal and a shell is fired with a muzzle velocity v0 towards a vertical cliff at a distance R away. Then the height from the bottom at which the shell strikes the side walls of the cliff is
Answer» A cannon on a level plain is aimed at an angle $α$ above the horizontal and a shell is fired with a muzzle velocity $v_{0}$ towards a vertical cliff at a distance R away. Then the height from the bottom at which the shell strikes the side walls of the cliff is

Discussion

14621.	A simple pendulum has a length of 4 m and acceleration due to gravity is taken to be 9.8 m/s2. What is the approximate value of the time period?
Answer» A simple pendulum has a length of $4 m$ and acceleration due to gravity is taken to be $9.8 {m/s}^{2}$ . What is the approximate value of the time period?

Discussion

14622.	If f(x)=x cosx, find f′′(x).
Answer» If $f (x) = x cos x$ , find $f^{''} (x)$ .

Discussion

14623.	A current of 10 a is flowing east to west in a long wire kept in the east-west direction find magnetic field in a vertical plane at a distance of 40 cm downwards
Answer» A current of 10 a is flowing east to west in a long wire kept in the east-west direction find magnetic field in a vertical plane at a distance of 40 cm downwards

Discussion

14624.	Latin name of tungstun
Answer» Latin name of tungstun

Discussion

14625.	an electron moving on a circular orbit of radius r with speed v. it produces a magnetic field B at its centre,then radius of circle is proportional to
Answer» an electron moving on a circular orbit of radius r with speed v. it produces a magnetic field B at its centre,then radius of circle is proportional to

Discussion

14626.	Evaluate :Tan 70°-tan 20°divided by tan 50°.
Answer» Evaluate : Tan 70°-tan 20°divided by tan 50°.

Discussion

14627.	When a 2μC of charge is carried from a point A to point B, the amount of work done by electric field is 50μJ. What is the potential difference and which point is at a higher potential ?
Answer» When a $2 μ C$ of charge is carried from a point A to point B, the amount of work done by electric field is $50 μ J$ . What is the potential difference and which point is at a higher potential ?

Discussion

14628.	A box moving on a level ground at a constant velocity is an example of ___ acceleration.
Answer» A box moving on a level ground at a constant velocity is an example of ___ acceleration.

Discussion

14629.	(1) 0(4) 20/0(3) oleo18. Four point positive charges of same magnitude (Q)S. The fluxrough theare placed at four corners of a rigid square frameas shown in figure. The plane of the frame isperpendicular to Z-axis. If a negative point chargeis placed at a distance z away from the aboveframe (z
Answer» (1) 0(4) 20/0(3) oleo18. Four point positive charges of same magnitude (Q)S. The fluxrough theare placed at four corners of a rigid square frameas shown in figure. The plane of the frame isperpendicular to Z-axis. If a negative point chargeis placed at a distance z away from the aboveframe (z << L) thenQ.Lhargedistance(1) Negative charge oscillates along the Z-axis(2) It moves away from the frame(3) It moves slowly towards the frame and staysin the plane of the frame(4) It passes through the frame only once19. Two parallel large thin metal sheets have equalyEDMI NOTE 5 PROface charge densities (o = 26.4 x 10-12 C/m2)DUAL CAMERAf opposite signs. The electric field between thesesheets isZ-axis

Discussion

14630.	what is tautomeric?
Answer» what is tautomeric?

Discussion

14631.	A trolley of initial mass m0 is kept over a smooth surface, as shown in the figure. A constant force F is applied on it. Sand kept inside the trolley drains out from its floor at a constant rate of μ kg/s. After time, t find the velocity of trolley.
Answer» A trolley of initial mass $m_{0}$ is kept over a smooth surface, as shown in the figure. A constant force $F$ is applied on it. Sand kept inside the trolley drains out from its floor at a constant rate of $μ kg/s$ . After time, $t$ find the velocity of trolley.

Discussion

14632.	The quantity of electricity required to reduce 12.3g of nitro benzene to aniline assuming 50%current effeciency is(1) 115800 C(2) 57900 C(3) 231600 C(4) 28950 C
Answer» The quantity of electricity required to reduce 12.3g of nitro benzene to aniline assuming 50%current effeciency is(1) 115800 C(2) 57900 C(3) 231600 C(4) 28950 C

Discussion

14633.	Match the following for the given process: (A) Process J→K(p) W>0(B) Process K→L(q) W>0(C) Process L→M(r) Q>0(D) Process M→J(q) Q>0 A: s, B: p,r, C: r, D: s,r
Answer» Match the following for the given process: $\begin{matrix} (A) P r o c e s s J \to K & (p) W > 0 (B) P r o c e s s K \to L & (q) W > 0 (C) P r o c e s s L \to M & (r) Q > 0 (D) P r o c e s s M \to J & (q) Q > 0 \end{matrix}$ A: s, B: p,r, C: r, D: s,r

Discussion

14634.	27. The density of a cube is measured by measuringits mass and length of its sides. If the maximumerror in the measurement of mass and lengths are3% and 2% respectively, the maximum error inthe measurement of density would b
Answer» 27. The density of a cube is measured by measuringits mass and length of its sides. If the maximumerror in the measurement of mass and lengths are3% and 2% respectively, the maximum error inthe measurement of density would b

Discussion

14635.	Radiation of wavelength λ, is incident on a photocell. The fastest emitted electron has speed v. If the wavelength is changed to 3λ4, the speed of the fastest emitted electron will be :
Answer» Radiation of wavelength $λ,$ is incident on a photocell. The fastest emitted electron has speed $v$ . If the wavelength is changed to $\frac{3 λ}{4}$ , the speed of the fastest emitted electron will be :

Discussion

14636.	47.7 capacitors each of capacitance 2 mF to be connected to obtain a capacitance of 10/11 mF. Which of the following combination is possible 5 in parallel, 2 in series 4 in parallel, 3 in series 3 in parallel, 4 in series 2 in parallel, 5 in series
Answer» 47.7 capacitors each of capacitance 2 mF to be connected to obtain a capacitance of 10/11 mF. Which of the following combination is possible 5 in parallel, 2 in series 4 in parallel, 3 in series 3 in parallel, 4 in series 2 in parallel, 5 in series

Discussion

14637.	An air filled capacitor with a dielectric slab inside it is completely charged upto energy U and disconnected from battery. If the dielectric slab between the plates is removed slowly by an external agent, the work done by external agent is 3U. The dielectric constant of the slab is:(Assume the process to be ideal & no energy is lost)
Answer» An air filled capacitor with a dielectric slab inside it is completely charged upto energy $U$ and disconnected from battery. If the dielectric slab between the plates is removed slowly by an external agent, the work done by external agent is $3 U$ . The dielectric constant of the slab is: (Assume the process to be ideal & no energy is lost)

Discussion

14638.	An object is placed in front of a mirror, image is 2 times and can be obtained on the screen. If object is displaced by 5 cm along Principal Axis, The image size becomes 3 times and can be obtained on the screen. Find out original distance of object from mirror and focal length of mirror.
Answer» An object is placed in front of a mirror, image is 2 times and can be obtained on the screen. If object is displaced by 5 cm along Principal Axis, The image size becomes 3 times and can be obtained on the screen. Find out original distance of object from mirror and focal length of mirror.

Discussion

14639.	A heavy string is tied at one end to a movable support and to a light thread at the other end as shown in figure (15-E12). The thread goes over a fixed pulley and supports a weight to produce a tension. The lowest frequency with which the heavy string resonates is 1.20 Hz. If the movable suppor is pushed to the right by 10 cm so that the joint is placed on the pulley, what will be the minimum frequency at which the heavy string can resonate ?
Answer» A heavy string is tied at one end to a movable support and to a light thread at the other end as shown in figure (15-E12). The thread goes over a fixed pulley and supports a weight to produce a tension. The lowest frequency with which the heavy string resonates is 1.20 Hz. If the movable suppor is pushed to the right by 10 cm so that the joint is placed on the pulley, what will be the minimum frequency at which the heavy string can resonate ?

14639.

A heavy string is tied at one end to a movable support and to a light thread at the other end as shown in figure (15-E12). The thread goes over a fixed pulley and supports a weight to produce a tension. The lowest frequency with which the heavy string resonates is 1.20 Hz. If the movable suppor is pushed to the right by 10 cm so that the joint is placed on the pulley, what will be the minimum frequency at which the heavy string can resonate ?

Answer»

A heavy string is tied at one end to a movable support and to a light thread at the other end as shown in figure (15-E12). The thread goes over a fixed pulley and supports a weight to produce a tension. The lowest frequency with which the heavy string resonates is 1.20 Hz. If the movable suppor is pushed to the right by 10 cm so that the joint is placed on the pulley, what will be the minimum frequency at which the heavy string can resonate ?

Discussion

14640.	Four students were given different resistors and asked to plot the corresponding graphs. Which student got the highest resistance value ?
Answer» Four students were given different resistors and asked to plot the corresponding graphs. Which student got the highest resistance value ?

Discussion

14641.	How can one "prove” Newton's first law?
Answer» How can one "prove” Newton's first law?

Discussion

14642.	A point source of light B is placed at a distance L in front of the centre of a mirror of width d hung vertically on a wall. A man walks in front of themirror along a line parallel to the mirror at a distance 2L from it as shown. The greatest distance over which he can see the image of the light source in the mirror is [IIT-JEE (Screening) 2000]
Answer» A point source of light B is placed at a distance L in front of the centre of a mirror of width d hung vertically on a wall. A man walks in front of themirror along a line parallel to the mirror at a distance 2L from it as shown. The greatest distance over which he can see the image of the light source in the mirror is [IIT-JEE (Screening) 2000]

14642.

A point source of light B is placed at a distance L in front of the centre of a mirror of width d hung vertically on a wall. A man walks in front of themirror along a line parallel to the mirror at a distance 2L from it as shown. The greatest distance over which he can see the image of the light source in the mirror is [IIT-JEE (Screening) 2000]

Answer»

A point source of light B is placed at a distance L in front of the centre of a mirror of width d hung vertically on a wall. A man walks in front of themirror along a line parallel to the mirror at a distance 2L from it as shown. The greatest distance over which he can see the image of the light source in the mirror is

[IIT-JEE (Screening) 2000]

Discussion

14643.	Magnetic flux (ϕ) linked through the coil changes with respect to time (t) according to following graph, then induced emf (e) v/s time(t) graph for coil is:
Answer» Magnetic flux $(ϕ)$ linked through the coil changes with respect to time $(t)$ according to following graph, then induced emf $(e)$ v/s time $(t)$ graph for coil is:

Discussion

14644.	63. how many Faraday are required to produce 50g of aluminium from molten Al2O3
Answer» 63. how many Faraday are required to produce 50g of aluminium from molten Al2O3

Discussion

14645.	A man is walking due east at the speed of 3 km/h. Rain appears to fall down vertically at the rate of 3 km/h. The magnitude of actual velocity of the rain is
Answer» A man is walking due east at the speed of $3 km/h$ . Rain appears to fall down vertically at the rate of $3 km/h$ . The magnitude of actual velocity of the rain is

Discussion

14646.	Equation of longitudinal stationary waves in the pipe is
Answer» Equation of longitudinal stationary waves in the pipe is

Discussion

14647.	Using theproperty of determinants and without expanding, prove that:
Answer» Using the property of determinants and without expanding, prove that:

14647.

Using theproperty of determinants and without expanding, prove that:

Answer»

Using the
property of determinants and without expanding, prove that:

Discussion

14648.	A light ray from air is incident (as shown in figure) at one end of a glass fiber (refractive index m = 1.5) making an incidence angle of 60o on the lateral surface, so that it undergoes a total internal reflection. How much time would it take to traverse the straight fiber of length 1 km
Answer» A light ray from air is incident (as shown in figure) at one end of a glass fiber (refractive index m = 1.5) making an incidence angle of 60^o on the lateral surface, so that it undergoes a total internal reflection. How much time would it take to traverse the straight fiber of length 1 km

Discussion

14649.	Each capacitor is of 2μF Max energy stored in capacitor between A and B [Single capacitor between A and B] in μJ is .
Answer» Each capacitor is of $2 μ F$ Max energy stored in capacitor between A and B [Single capacitor between A and B] in $μ J$ is .

Discussion

14650.	When the rate of change of current through the coil is unity, then the induced emf is equal to
Answer» When the rate of change of current through the coil is unity, then the induced emf is equal to

Discussion

Explore topic-wise InterviewSolutions in .

The displacement of the point of the wheel initially in contact with the ground, when the wheel rolls forward half a revolution will be (radius of the wheel is R)

The transfer function of DT feedback system is H(z)=P1+P(zz−0.9)The range of P, for which the system is stable will be

A network of resistances is constructed with R1 and R2 as shown in the figure. The potential at the points 1, 2, 3 … n are V1,V2,V3,…Vn respectively, each having a potential k times smaller than the previous one.The current that passes through the resistance R2 nearest to the Vα is

if the angle is 180, then why will torque be zero? because the body will try to rotate itself

A pendulum bob has a speed 3m/swhile passing through its lowest position. What is its speed when it makes on angle of 60∘ with the vertical? The length of the pendulum is 0.5m. Take g = 10 m/s2.

123.The linear charge density on the circumference of a circle of radius A varies as d=dcos theta . The total charge on it is?

Two springs A and B have force constants k1 and k2 respectively. The ratio of work done on A to that done on B when they are stretched by the same force is

if the radius of earth shrinks by 2% ,mass remaining constant,then how would the value of acceleration due to gravity change. witn simple method

mass of carbon anode consumed giving only co2 in the production of 270 kg of Al metal from bauxite by Hall process is (i)180 kg (ii)270 kg (iii)540 kg (iv)90 k

Potentiometer wire length is 10 m, having a total resistance of 10 Ω. If a battery of emf 2 V (of negligible internal resistance) and a rheostat are connected to it then the potential gradient is 2 mV m−1. Find the resistance imparted through the rheostat:

A voltage source having the Laplace transform s2+3s+22s2+6s+5 is applied across a 2 H inductor having zero intial current. The current in the inductor at t=∞ is ___ A. (Answer upto two decimal places)0.2

if in a stationary wave the amplitude of antinode is 4 cm then amplitude corresponding to a particle of medium located exactly Midway between a node and antinode is

A second's pendulum is placed in a space laboratory orbiting around the earth at a height 3R, where R is the radius of the earth. The time period of the pendulum is

Light of wavelength 0.6μm from a sodium lamp falls on a photo cell and causes the emission of photoelectrons for which the stopping potential is 0.5V with light of wavelength 0.4μm from a sodium lamp, the stopping potential is 1.5V, with this data the value of heis:

4.Two metallic spheres of radii r and 3r placed far away from each other,carry charges 3q and q respectively. They are now connected by a thin conducting wire. Cjarge on smaller sphere in electrostatic equilibrium is

What is the average thermal energy of a diatomic gas? And what is thermal energy?

The radius of curvature of a concave mirror is 24 cm and the image is magnified by 1.5 times. The object distance is???

A cannon on a level plain is aimed at an angle α above the horizontal and a shell is fired with a muzzle velocity v0 towards a vertical cliff at a distance R away. Then the height from the bottom at which the shell strikes the side walls of the cliff is

A simple pendulum has a length of 4 m and acceleration due to gravity is taken to be 9.8 m/s2. What is the approximate value of the time period?

If f(x)=x cosx, find f′′(x).

A current of 10 a is flowing east to west in a long wire kept in the east-west direction find magnetic field in a vertical plane at a distance of 40 cm downwards

Latin name of tungstun

an electron moving on a circular orbit of radius r with speed v. it produces a magnetic field B at its centre,then radius of circle is proportional to

Evaluate :Tan 70°-tan 20°divided by tan 50°.

When a 2μC of charge is carried from a point A to point B, the amount of work done by electric field is 50μJ. What is the potential difference and which point is at a higher potential ?

A box moving on a level ground at a constant velocity is an example of ___ acceleration.

(1) 0(4) 20/0(3) oleo18. Four point positive charges of same magnitude (Q)S. The fluxrough theare placed at four corners of a rigid square frameas shown in figure. The plane of the frame isperpendicular to Z-axis. If a negative point chargeis placed at a distance z away from the aboveframe (z

what is tautomeric?

A trolley of initial mass m0 is kept over a smooth surface, as shown in the figure. A constant force F is applied on it. Sand kept inside the trolley drains out from its floor at a constant rate of μ kg/s. After time, t find the velocity of trolley.

The quantity of electricity required to reduce 12.3g of nitro benzene to aniline assuming 50%current effeciency is(1) 115800 C(2) 57900 C(3) 231600 C(4) 28950 C

Match the following for the given process: (A) Process J→K(p) W&gt;0(B) Process K→L(q) W&gt;0(C) Process L→M(r) Q&gt;0(D) Process M→J(q) Q&gt;0 A: s, B: p,r, C: r, D: s,r

27. The density of a cube is measured by measuringits mass and length of its sides. If the maximumerror in the measurement of mass and lengths are3% and 2% respectively, the maximum error inthe measurement of density would b

Radiation of wavelength λ, is incident on a photocell. The fastest emitted electron has speed v. If the wavelength is changed to 3λ4, the speed of the fastest emitted electron will be :

47.7 capacitors each of capacitance 2 mF to be connected to obtain a capacitance of 10/11 mF. Which of the following combination is possible 5 in parallel, 2 in series 4 in parallel, 3 in series 3 in parallel, 4 in series 2 in parallel, 5 in series

An object is placed in front of a mirror, image is 2 times and can be obtained on the screen. If object is displaced by 5 cm along Principal Axis, The image size becomes 3 times and can be obtained on the screen. Find out original distance of object from mirror and focal length of mirror.

Four students were given different resistors and asked to plot the corresponding graphs. Which student got the highest resistance value ?

How can one "prove” Newton's first law?

Magnetic flux (ϕ) linked through the coil changes with respect to time (t) according to following graph, then induced emf (e) v/s time(t) graph for coil is:

63. how many Faraday are required to produce 50g of aluminium from molten Al2O3

A man is walking due east at the speed of 3 km/h. Rain appears to fall down vertically at the rate of 3 km/h. The magnitude of actual velocity of the rain is

Equation of longitudinal stationary waves in the pipe is

Using theproperty of determinants and without expanding, prove that:

A light ray from air is incident (as shown in figure) at one end of a glass fiber (refractive index m = 1.5) making an incidence angle of 60o on the lateral surface, so that it undergoes a total internal reflection. How much time would it take to traverse the straight fiber of length 1 km​

Each capacitor is of 2μF Max energy stored in capacitor between A and B [Single capacitor between A and B] in μJ is .

When the rate of change of current through the coil is unity, then the induced emf is equal to

Match the following for the given process: (A) Process J→K(p) W>0(B) Process K→L(q) W>0(C) Process L→M(r) Q>0(D) Process M→J(q) Q>0 A: s, B: p,r, C: r, D: s,r

A light ray from air is incident (as shown in figure) at one end of a glass fiber (refractive index m = 1.5) making an incidence angle of 60o on the lateral surface, so that it undergoes a total internal reflection. How much time would it take to traverse the straight fiber of length 1 km