50278 + Interview Questions in Physics

1.	A parallel plate capacitor is connected to a battery of emf 10 V. If the separation between the two plates is 5 mm, then the energy stored per unit volume between the plates is
Answer» A parallel plate capacitor is connected to a battery of emf $10 V$ . If the separation between the two plates is $5 mm$ , then the energy stored per unit volume between the plates is

Discussion

2.	39.The electric potential on the surface of a sphere of radius R and charge 3X10^-6 C is 500 V. The intensity of electric field on the surface of the sphere is?
Answer» 39.The electric potential on the surface of a sphere of radius R and charge 3X10^-6 C is 500 V. The intensity of electric field on the surface of the sphere is?

Discussion

3.	Current gain βAC in common emitter mode of transistor is
Answer» Current gain $β_{A C}$ in common emitter mode of transistor is

Discussion

4.	An infinite line charge produces a field of 18 × 104 N/C at a distance of 2 metre from it. The linear charge density is
Answer» An infinite line charge produces a field of 18 × 104 N/C at a distance of 2 metre from it. The linear charge density is

Discussion

5.	two charges -4q and q are kept at (-a,0) and (a,0) respectively. The graph showing in the variation of electric field along x axis is
Answer» two charges -4q and q are kept at (-a,0) and (a,0) respectively. The graph showing in the variation of electric field along x axis is

Discussion

6.	A balloon rises upward with speed of 10 m/s when the balloon is at a height of 100 m above ground a stone is dropped from it. a) Time taken by stone to reach ground. b) Maximum height attained by stone.
Answer» A balloon rises upward with speed of 10 m/s when the balloon is at a height of 100 m above ground a stone is dropped from it. a) Time taken by stone to reach ground. b) Maximum height attained by stone.

Discussion

7.	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 ratio R1R2 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 ratio $\frac{R_{1}}{R_{2}}$ is

Discussion

8.	If a guy is swimming in a pool from the floor towards the upward direction then in which direction will the opposing force act?
Answer» If a guy is swimming in a pool from the floor towards the upward direction then in which direction will the opposing force act?

Discussion

9.	Suppose the kinetic energy of a body oscillating with amplitude A and at a distance x is given by K=Bxx2+A2. The dimensions of B are the same as that of
Answer» Suppose the kinetic energy of a body oscillating with amplitude $A$ and at a distance $x$ is given by $K = \frac{B x}{x^{2} + A^{2}}$ . The dimensions of $B$ are the same as that of

Discussion

10.	Why does the semi-permeable membrane allows only water to enter and exit the cell during osmosis and why not solute
Answer» Why does the semi-permeable membrane allows only water to enter and exit the cell during osmosis and why not solute

Discussion

11.	The number of integral value(s) of b for which vector (b2−3b−18)^i−4^j+(b2−64)^k makes obtuse angle with co-ordinate axes is equal to
Answer» The number of integral value(s) of $b$ for which vector $(b^{2} - 3 b - 18)^i - 4^j + (b^{2} - 64)^k$ makes obtuse angle with co-ordinate axes is equal to

Discussion

12.	Match the following for the motion of a falling object:
Answer» Match the following for the motion of a falling object:

Discussion

13.	The electric field components in the given figure are Ex=αx12,Ey=Ez=0 in which α=800NC−1m–12. The charge within the cube is if net flux through the cube is 1.05Nm2C−1 (assume a = 0.1 m)
Answer» The electric field components in the given figure are $E_{x} = α x^{\frac{1}{2}}, E_{y} = E_{z} = 0$ in which $α = 800 N C^{- 1} m^{\frac{- 1}{2}}$ . The charge within the cube is if net flux through the cube is $1.05 N m^{2} C^{- 1}$ (assume a = 0.1 m)

13.

The electric field components in the given figure are Ex=αx12,Ey=Ez=0 in which α=800NC−1m–12. The charge within the cube is if net flux through the cube is 1.05Nm2C−1 (assume a = 0.1 m)

Answer»

The electric field components in the given figure are $E_{x} = α x^{\frac{1}{2}}, E_{y} = E_{z} = 0$ in which $α = 800 N C^{- 1} m^{\frac{- 1}{2}}$ . The charge within the cube is if net flux through the cube is $1.05 N m^{2} C^{- 1}$ (assume a = 0.1 m)

Discussion

14.	A container is divided into 2 equal parts 1 and 2 by a partition with a small hole of diameter d. The 2 partitions are filled with same ideal gas , but held at different temperatures T1=150K, T2= 300K by connecting to 2 heat reservoirs . If l1 and l2 are mean free paths in the two parts such that d>>l1 and d>> l2 ,find l1/ l2.
Answer» A container is divided into 2 equal parts 1 and 2 by a partition with a small hole of diameter d. The 2 partitions are filled with same ideal gas , but held at different temperatures T1=150K, T2= 300K by connecting to 2 heat reservoirs . If l1 and l2 are mean free paths in the two parts such that d>>l1 and d>> l2 ,find l1/ l2.

Discussion

15.	In the arrangement shown in the figure, accelerations of blocks A,B and C are aA,aB and aC respectively. Consider string and pulley to be mass-less and friction absent everywhere in the arrangement. Then
Answer» In the arrangement shown in the figure, accelerations of blocks $A, B$ and $C$ are $a_{A}, a_{B}$ and $a_{C}$ respectively. Consider string and pulley to be mass-less and friction absent everywhere in the arrangement. Then

Discussion

16.	why tension is a non conservative force
Answer» why tension is a non conservative force

Discussion

17.	Four independent waves are represented by the following equations:X1=a1 sin ωt ...(1)X2=a1 sin 2ωt ...(2)X3=a1 sin ω1t ...(3)X4=a1sin (ωt+δ) ...(4)Interference is possible between waves represented by the equations,
Answer» Four independent waves are represented by the following equations: $X_{1} = a_{1} sin ω t . . . (1)$ $X_{2} = a_{1} sin 2 ω t . . . (2)$ $X_{3} = a_{1} sin ω_{1} t . . . (3)$ $X_{4} = a_{1} sin (ω t + δ) . . . (4)$ Interference is possible between waves represented by the equations,

Discussion

18.	Which of the following will be Step IV?
Answer» Which of the following will be Step IV?

Discussion

19.	a body floats ina liquidvcontained in a beaker.The whole system as shown in the figure falls freely under gravity,the upthrust on the body i
Answer» a body floats ina liquidvcontained in a beaker.The whole system as shown in the figure falls freely under gravity,the upthrust on the body i

Discussion

20.	The work function of a metal is 1.6×10−19J. When the metal surface is illuminated by the light of wavelength 6400∘A , then the maximum kinetic energy of emitted photo-electrons will be (Planck's constant h=6.4×10−34 Js)
Answer» The work function of a metal is $1.6 \times 10^{- 19} J$ . When the metal surface is illuminated by the light of wavelength $6400 \circ A$ , then the maximum kinetic energy of emitted photo-electrons will be (Planck's constant $h = 6.4 \times 10^{- 34} J s$ )

Discussion

21.	a string of length L fixed at both ends vibrates in its fundamental mode at a frequency f and a maximum amplitude A.take the origin at one end of the string and the X axis along the string.take the Y axis along the direction of the displacement.take t=0 at the instant when the middle point of the string passes through its mean position and is going towards the +ve y direction.write the equation describing the standing wave.
Answer» a string of length L fixed at both ends vibrates in its fundamental mode at a frequency f and a maximum amplitude A.take the origin at one end of the string and the X axis along the string.take the Y axis along the direction of the displacement.take t=0 at the instant when the middle point of the string passes through its mean position and is going towards the +ve y direction.write the equation describing the standing wave.

Discussion

22.	Charges Q, 2Q and −Q are given to three concentric conducting spherical shell A, B and C respectively as shown in figure. The ratio of charges on the inner and outer surfaces of shell C will be
Answer» Charges $Q, 2 Q$ and $- Q$ are given to three concentric conducting spherical shell $A, B$ and $C$ respectively as shown in figure. The ratio of charges on the inner and outer surfaces of shell $C$ will be

Discussion

23.	A rectangular loop, of size 10 cm×3 cm, is moving out of a region of uniform magnetic field of 0.5 T, directed normal inwards into the loop. If we want to move the loop with a constant velocity of 1 cm/s, the force required is -Take, resistance of loop =1 mΩ
Answer» A rectangular loop, of size $10 cm \times 3 cm$ , is moving out of a region of uniform magnetic field of $0.5 T$ , directed normal inwards into the loop. If we want to move the loop with a constant velocity of $1 cm/s$ , the force required is - Take, resistance of loop $= 1 m Ω$

Discussion

24.	Consider two solid uniform spherical objects of the same density ρ. One has radius R and the other has radius 2R. They are in outer space where the gravitational fields from other objects are negligible. If they are arranged with their surface touching, what is the contact force between the objects due to their traditional attraction ?
Answer» Consider two solid uniform spherical objects of the same density $ρ .$ One has radius $R$ and the other has radius $2 R .$ They are in outer space where the gravitational fields from other objects are negligible. If they are arranged with their surface touching, what is the contact force between the objects due to their traditional attraction ?

Discussion

25.	The magnetic susceptibility of a rod is 499. The absolute permeability of vacuum is μ0=4π×10−7 Hm−1. The absolute permeability of the material of the rod is-
Answer» The magnetic susceptibility of a rod is $499.$ The absolute permeability of vacuum is $μ_{0} = 4 π \times 10^{- 7} {Hm}^{- 1} .$ The absolute permeability of the material of the rod is-

Discussion

26.	Two polaroids are crossed to each other. Now, one of them is rotated through 60∘. What percentage of incident unpolarized light will pass through the system?
Answer» Two polaroids are crossed to each other. Now, one of them is rotated through $60^{\circ} .$ What percentage of incident unpolarized light will pass through the system?

Discussion

27.	In a Young’s double slit experiment the light source is at distance l1=20 μm and l2=40 μm from the slit.The light of wavelength λ=500 nm incident on slits separated at a distance d=10μm. A screen is placed at a distance D=2 m away from the slits as shown in the figure. If (10k+1) maxima appears on the screen, then find the value of k. Round off your answer to the nearest integer, if required.
Answer» In a Young’s double slit experiment the light source is at distance $l_{1} = 20 μ m$ and $l_{2} = 40 μ m$ from the slit.The light of wavelength $λ = 500 nm$ incident on slits separated at a distance $d = 10 μ m$ . A screen is placed at a distance $D = 2 m$ away from the slits as shown in the figure. If $(10 k + 1)$ maxima appears on the screen, then find the value of $k$ . Round off your answer to the nearest integer, if required.

Discussion

28.	Is acceleration is opposite in direction to electric field in case of negative source charge?
Answer» Is acceleration is opposite in direction to electric field in case of negative source charge?

Discussion

29.	One mole of an ideal gas undergoes a process :P=P01+(V0/V)2Here P0 and V0 are constants. Change in temparature of the gas when volume is changed from V=V0 to V=2V0 is
Answer» One mole of an ideal gas undergoes a process : $P = \frac{P_{0}}{1 + (V_{0} / V)^{2}}$ Here $P_{0}$ and $V_{0}$ are constants. Change in temparature of the gas when volume is changed from $V = V_{0}$ to $V = 2 V_{0}$ is

Discussion

30.	33.What are piezoelectric , pyroelectric substances?
Answer» 33.What are piezoelectric , pyroelectric substances?

Discussion

31.	Two wooden block moving on a smooth horizontal surface such that the mass m remains stationary with respect to the block of mass M. The magnitude of force P is
Answer» Two wooden block moving on a smooth horizontal surface such that the mass m remains stationary with respect to the block of mass M. The magnitude of force P is

31.

Two wooden block moving on a smooth horizontal surface such that the mass m remains stationary with respect to the block of mass M. The magnitude of force P is

Answer»

Two wooden block moving on a smooth horizontal surface such that the mass m remains stationary with respect to the block of mass M. The magnitude of force P is

Discussion

32.	magnus effect
Answer» magnus effect

Discussion

33.	If mass of A=10 kg , coefficient of static friction= 0.2, coefficient of kinetic friction = 0.2. The mass of B is 20 kg. Find acceleration of masses
Answer» If mass of $A = 10 kg$ , coefficient of static friction= $0.2$ , coefficient of kinetic friction = $0.2$ . The mass of $B$ is $20 kg$ . Find acceleration of masses

Discussion

34.	A cell of internal resistances r is connected to a load of resistance R. Energy is dissipated in the load, but some thermal energy is also wasted in the cell. The efficiency of such arrangement is found from the expressionEnergy dissipated in the loadEnergy dissipated in the complete circuitWhich of the following gives the efficiency in this case?
Answer» A cell of internal resistances $r$ is connected to a load of resistance $R$ . Energy is dissipated in the load, but some thermal energy is also wasted in the cell. The efficiency of such arrangement is found from the expression $\frac{Energy dissipated in the load}{Energy dissipated in the complete circuit}$ Which of the following gives the efficiency in this case?

Discussion

35.	Two persons do the same amount of work. The first does it in 5 s and the second in 15 s. Find the ratio of the power used by the first person to that by the second person.
Answer» Two persons do the same amount of work. The first does it in $5 s$ and the second in $15 s$ . Find the ratio of the power used by the first person to that by the second person.

Discussion

36.	31.A tuning fork give 4 beats with 50 cm length of the sonometer wire if the length of the wire shortened by 1 cm but it still produces 4 beats than what is the frequency of the fork
Answer» 31.A tuning fork give 4 beats with 50 cm length of the sonometer wire if the length of the wire shortened by 1 cm but it still produces 4 beats than what is the frequency of the fork

Discussion

37.	PHYSICS- GRAVITATION A hydrogen balloon released on the moon A)Climbs up with an acceleration 6x9.8ms_-2 B)Climbs up with an acceleration of 9.8/6ms_-2 C)Bursts D)Falls with an acceleration of 9.8/6 ms_-2
Answer» PHYSICS- GRAVITATION A hydrogen balloon released on the moon A)Climbs up with an acceleration 6x9.8ms_-2 B)Climbs up with an acceleration of 9.8/6ms_-2 C)Bursts D)Falls with an acceleration of 9.8/6 ms_-2

Discussion

38.	Water flows in a rectangular, concrete, open channel which is 12 m wide at a depth of 2.5 m. The channel slope is 0.0028, and the manning coefficient is 0.013. the velocity of flow (in m/sec) is 5.945
Answer» Water flows in a rectangular, concrete, open channel which is 12 m wide at a depth of 2.5 m. The channel slope is 0.0028, and the manning coefficient is 0.013. the velocity of flow (in m/sec) is 5.945

Discussion

39.	An alternating current of frequency 'f' is flowing in a circuit containing a resistance R and a choke L in series. The impedance of this circuit is
Answer» An alternating current of frequency 'f' is flowing in a circuit containing a resistance R and a choke L in series. The impedance of this circuit is

Discussion

40.	Two particles executing SHM of same frequency,meet at x= +A/2, while moving in opposite direction. Phase difference between particles is
Answer» Two particles executing SHM of same frequency,meet at x= +A/2, while moving in opposite direction. Phase difference between particles is

Discussion

41.	A thin tube of uniform cross section is sealed at both ends. It lies horizontally, the middle 5 cm containing mercury and the parts on its two sides containing air at the same pressure P. When the tube is held at an angle of 60∘ with the vertical, the length of the air column above and below the mercury pellet are 46cm and 44.5cm respectively. Calculate the pressure P in centimeters of mercury. The temperature of the system is kept at 30∘C.
Answer» A thin tube of uniform cross section is sealed at both ends. It lies horizontally, the middle 5 cm containing mercury and the parts on its two sides containing air at the same pressure P. When the tube is held at an angle of $60^{\circ}$ with the vertical, the length of the air column above and below the mercury pellet are 46cm and 44.5cm respectively. Calculate the pressure P in centimeters of mercury. The temperature of the system is kept at $30^{\circ} C$ .

Discussion

42.	Will focal length of a lens for a red light be more, same or less than that for a blue light?
Answer» Will focal length of a lens for a red light be more, same or less than that for a blue light?

Discussion

43.	The door of an almirah is 6 ft high, 1.5 ft wide and weighs 8 kg. The door is supported by two hinges situated at a distance of 1 ft from the top and bottom ends. Assuming force exerted on the hinges are equal, the magnitude of the force is[Take g=10 m/s2]
Answer» The door of an almirah is $6 ft$ high, $1.5 ft$ wide and weighs $8 kg$ . The door is supported by two hinges situated at a distance of $1 ft$ from the top and bottom ends. Assuming force exerted on the hinges are equal, the magnitude of the force is [Take $g = 10 {m/s}^{2}$ ]

Discussion

44.	A particle of mass m moving along straight-line experiences force F which varies with the distance travelled as shown in the graph. If the velocity of the particle at x0 is
Answer» A particle of mass m moving along straight-line experiences force F which varies with the distance travelled as shown in the graph. If the velocity of the particle at x0 is

Discussion

45.	Two long current carrying thin wires, both with current I, are held by insulating threads of length L and are in equilibrium as shown in the figure, with threads making an angle 'θ' with the vertical. If mass per unit length of wire is λ, then the value of I is (g = gravitational acceleration)
Answer» Two long current carrying thin wires, both with current $I$ , are held by insulating threads of length $L$ and are in equilibrium as shown in the figure, with threads making an angle ' $θ$ ' with the vertical. If mass per unit length of wire is $λ$ , then the value of $I$ is ( $g$ = gravitational acceleration)

Discussion

46.	At resonance the impedance of RLC circuit is
Answer» At resonance the impedance of RLC circuit is

Discussion

47.	What is the difference between accuracy and precision?
Answer» What is the difference between accuracy and precision?

Discussion

48.	A circular coil of radius 2.0 cm has 500 turns in it and carries a current of 1.0 A. Its axis makes an angle of 30∘ with the uniform magnetic field of magnitude 0.40 T that exists in the space. Find the torque acting on the coil.
Answer» A circular coil of radius 2.0 cm has 500 turns in it and carries a current of 1.0 A. Its axis makes an angle of $30^{\circ}$ with the uniform magnetic field of magnitude 0.40 T that exists in the space. Find the torque acting on the coil.

Discussion

49.	A person applies a force of 20 N horizontally on a cube of weight 30 N, but it does not move at all. Identify the type of frictional force and also draw its free body diagram (FBD).
Answer» A person applies a force of 20 N horizontally on a cube of weight 30 N, but it does not move at all. Identify the type of frictional force and also draw its free body diagram (FBD).

Discussion

50.	31.In the figure block for mass m1 and ring of mass m2 are held in the position as shown given m2> m1. The system is released. m2 slides down along the smooth fixed vertical rod . When the string connecting the ring makes an angle 30^° with the vertical, velocity of m1 is 10m/s .What will be the speed of ring at that moment?
Answer» 31.In the figure block for mass m1 and ring of mass m2 are held in the position as shown given m2> m1. The system is released. m2 slides down along the smooth fixed vertical rod . When the string connecting the ring makes an angle 30^° with the vertical, velocity of m1 is 10m/s .What will be the speed of ring at that moment?

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

A parallel plate capacitor is connected to a battery of emf 10 V. If the separation between the two plates is 5 mm, then the energy stored per unit volume between the plates is

39.The electric potential on the surface of a sphere of radius R and charge 3X10^-6 C is 500 V. The intensity of electric field on the surface of the sphere is?

Current gain βAC in common emitter mode of transistor is

An infinite line charge produces a field of 18 × 104 N/C at a distance of 2 metre from it. The linear charge density is

two charges -4q and q are kept at (-a,0) and (a,0) respectively. The graph showing in the variation of electric field along x axis is

A balloon rises upward with speed of 10 m/s when the balloon is at a height of 100 m above ground a stone is dropped from it. a) Time taken by stone to reach ground. b) Maximum height attained by stone.

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 ratio R1R2 is

If a guy is swimming in a pool from the floor towards the upward direction then in which direction will the opposing force act?

Suppose the kinetic energy of a body oscillating with amplitude A and at a distance x is given by K=Bxx2+A2. The dimensions of B are the same as that of

Why does the semi-permeable membrane allows only water to enter and exit the cell during osmosis and why not solute

The number of integral value(s) of b for which vector (b2−3b−18)^i−4^j+(b2−64)^k makes obtuse angle with co-ordinate axes is equal to

Match the following for the motion of a falling object:

The electric field components in the given figure are Ex=αx12,Ey=Ez=0 in which α=800NC−1m–12. The charge within the cube is if net flux through the cube is 1.05Nm2C−1 (assume a = 0.1 m)

In the arrangement shown in the figure, accelerations of blocks A,B and C are aA,aB and aC respectively. Consider string and pulley to be mass-less and friction absent everywhere in the arrangement. Then

why tension is a non conservative force

Four independent waves are represented by the following equations:X1=a1 sin ωt ...(1)X2=a1 sin 2ωt ...(2)X3=a1 sin ω1t ...(3)X4=a1sin (ωt+δ) ...(4)Interference is possible between waves represented by the equations,

Which of the following will be Step IV?

a body floats ina liquidvcontained in a beaker.The whole system as shown in the figure falls freely under gravity,the upthrust on the body i

The work function of a metal is 1.6×10−19J. When the metal surface is illuminated by the light of wavelength 6400∘A , then the maximum kinetic energy of emitted photo-electrons will be (Planck's constant h=6.4×10−34 Js)

Charges Q, 2Q and −Q are given to three concentric conducting spherical shell A, B and C respectively as shown in figure. The ratio of charges on the inner and outer surfaces of shell C will be

A rectangular loop, of size 10 cm×3 cm, is moving out of a region of uniform magnetic field of 0.5 T, directed normal inwards into the loop. If we want to move the loop with a constant velocity of 1 cm/s, the force required is -Take, resistance of loop =1 mΩ

The magnetic susceptibility of a rod is 499. The absolute permeability of vacuum is μ0=4π×10−7 Hm−1. The absolute permeability of the material of the rod is-

Two polaroids are crossed to each other. Now, one of them is rotated through 60∘. What percentage of incident unpolarized light will pass through the system?

Is acceleration is opposite in direction to electric field in case of negative source charge?

One mole of an ideal gas undergoes a process :P=P01+(V0/V)2Here P0 and V0 are constants. Change in temparature of the gas when volume is changed from V=V0 to V=2V0 is

33.What are piezoelectric , pyroelectric substances?

Two wooden block moving on a smooth horizontal surface such that the mass m remains stationary with respect to the block of mass M. The magnitude of force P is

magnus effect

If mass of A=10 kg , coefficient of static friction= 0.2, coefficient of kinetic friction = 0.2. The mass of B is 20 kg. Find acceleration of masses

Two persons do the same amount of work. The first does it in 5 s and the second in 15 s. Find the ratio of the power used by the first person to that by the second person.

31.A tuning fork give 4 beats with 50 cm length of the sonometer wire if the length of the wire shortened by 1 cm but it still produces 4 beats than what is the frequency of the fork

PHYSICS- GRAVITATION A hydrogen balloon released on the moon A)Climbs up with an acceleration 6x9.8ms_-2 B)Climbs up with an acceleration of 9.8/6ms_-2 C)Bursts D)Falls with an acceleration of 9.8/6 ms_-2

Water flows in a rectangular, concrete, open channel which is 12 m wide at a depth of 2.5 m. The channel slope is 0.0028, and the manning coefficient is 0.013. the velocity of flow (in m/sec) is 5.945

An alternating current of frequency 'f' is flowing in a circuit containing a resistance R and a choke L in series. The impedance of this circuit is

Two particles executing SHM of same frequency,meet at x= +A/2, while moving in opposite direction. Phase difference between particles is

Will focal length of a lens for a red light be more, same or less than that for a blue light?

The door of an almirah is 6 ft high, 1.5 ft wide and weighs 8 kg. The door is supported by two hinges situated at a distance of 1 ft from the top and bottom ends. Assuming force exerted on the hinges are equal, the magnitude of the force is[Take g=10 m/s2]

A particle of mass m moving along straight-line experiences force F which varies with the distance travelled as shown in the graph. If the velocity of the particle at x0 is

Two long current carrying thin wires, both with current I, are held by insulating threads of length L and are in equilibrium as shown in the figure, with threads making an angle 'θ' with the vertical. If mass per unit length of wire is λ, then the value of I is (g = gravitational acceleration)

At resonance the impedance of RLC circuit is

What is the difference between accuracy and precision?

A circular coil of radius 2.0 cm has 500 turns in it and carries a current of 1.0 A. Its axis makes an angle of 30∘ with the uniform magnetic field of magnitude 0.40 T that exists in the space. Find the torque acting on the coil.

A person applies a force of 20 N horizontally on a cube of weight 30 N, but it does not move at all. Identify the type of frictional force and also draw its free body diagram (FBD).