50278 + Interview Questions in Physics

1.	How 3 dimensional vision is possible . Explain the principal used in 3 D lab .
Answer» How 3 dimensional vision is possible . Explain the principal used in 3 D lab .

Discussion

2.	11. The motion of a particle along a straight line is described by the function x= (2t-3)2 where x is in metre and t is in seconds . Find A) the velocity of the particle at origin
Answer» 11. The motion of a particle along a straight line is described by the function x= (2t-3)2 where x is in metre and t is in seconds . Find A) the velocity of the particle at origin

Discussion

3.	The critical angle of a medium for a specific wavelength if the medium has relative permittivity 3 and relative permeability 43 for this wavelength, will be:
Answer» The critical angle of a medium for a specific wavelength if the medium has relative permittivity $3$ and relative permeability $\frac{4}{3}$ for this wavelength, will be:

Discussion

4.	Figure 3.24 gives the x-t plot of a particle in one-dimensional motion. Three different equal intervals of time are shown. In which interval is the average speed greatest, and in which is it the least? Give the sign of average velocity for each interval. (Fig: 3.24)
Answer» Figure 3.24 gives the x-t plot of a particle in one-dimensional motion. Three different equal intervals of time are shown. In which interval is the average speed greatest, and in which is it the least? Give the sign of average velocity for each interval. (Fig: 3.24)

4.

Figure 3.24 gives the x-t plot of a particle in one-dimensional motion. Three different equal intervals of time are shown. In which interval is the average speed greatest, and in which is it the least? Give the sign of average velocity for each interval. (Fig: 3.24)

Answer»

Figure 3.24 gives the x-t plot of a particle in one-dimensional motion. Three different equal intervals of time are shown. In which interval is the average speed greatest, and in which is it the least? Give the sign of average velocity for each interval.

(Fig: 3.24)

Discussion

5.	According to De Broglie 2πr=nλ where n is the quantum number of an orbit, in visual representation of an electron as a wave, n stands for:
Answer» According to De Broglie 2 $π$ r=n $λ$ where n is the quantum number of an orbit, in visual representation of an electron as a wave, n stands for:

Discussion

6.	The weight of 350 ml of a diatomic gas at zero degree Celsius and 2 ATM pressure is 1 gram the weight of one atom is
Answer» The weight of 350 ml of a diatomic gas at zero degree Celsius and 2 ATM pressure is 1 gram the weight of one atom is

Discussion

7.	When charge of 3 coulomb is placed in a Uniform electric field, it experiences a force of 3000 newton, within this field, potential difference between two points separated by a distance of 1 cm is (in volt)
Answer» When charge of $3$ coulomb is placed in a Uniform electric field, it experiences a force of $3000$ newton, within this field, potential difference between two points separated by a distance of $1 cm$ is (in volt)

Discussion

8.	A simple pendulum of length l is suspended from the ceiling of a car moving with a speed v on a circular horizontal road of radius r. (a) Find the tension in the string when it is at rest with respect to the car. (b) Find the time period of small oscillation.
Answer» A simple pendulum of length l is suspended from the ceiling of a car moving with a speed v on a circular horizontal road of radius r. (a) Find the tension in the string when it is at rest with respect to the car. (b) Find the time period of small oscillation.

Discussion

9.	a bird flies for 2sec with velocity \|t-1\|m/s in a straight line, where t is in seconds. it covers a distance of
Answer» a bird flies for 2sec with velocity \|t-1\|m/s in a straight line, where t is in seconds. it covers a distance of

Discussion

10.	The deflection of a galvanometer falls to 1/10 th when a resis†an ce of 5 ohms is connected in parallel with it.If an additional resis†an ce of 2 ohms is connected in parallel to the galvanometer, the deflection is a) 1/6 th b) 1/16 th c) 2/65 th 4) 3/36 t
Answer» The deflection of a galvanometer falls to 1/10 th when a resis†an ce of 5 ohms is connected in parallel with it.If an additional resis†an ce of 2 ohms is connected in parallel to the galvanometer, the deflection is a) 1/6 th b) 1/16 th c) 2/65 th 4) 3/36 t

Discussion

11.	What is the graph between Momentum and mass*velocity?
Answer» What is the graph between Momentum and mass*velocity?

Discussion

12.	why mass and charge for electrons is same always
Answer» why mass and charge for electrons is same always

Discussion

13.	A square coil of side10 cm consists of 20 turns and carries a current of 12 A. The coil issuspended vertically and the normal to the plane of the coil makes anangle of 30º with the direction of a uniform horizontal magneticfield of magnitude 0.80 T. What is the magnitude of torqueexperienced by the coil?
Answer» A square coil of side 10 cm consists of 20 turns and carries a current of 12 A. The coil is suspended vertically and the normal to the plane of the coil makes an angle of 30º with the direction of a uniform horizontal magnetic field of magnitude 0.80 T. What is the magnitude of torque experienced by the coil?

Discussion

14.	An infinitely long solid cylinder of radius r has a uniform volume charge density rho. Magnitude of the electric field at point p which is at a distance r/2 from the axis of the cylinder
Answer» An infinitely long solid cylinder of radius r has a uniform volume charge density rho. Magnitude of the electric field at point p which is at a distance r/2 from the axis of the cylinder

Discussion

15.	Why is there no constant of proportionality in F=ma?
Answer» Why is there no constant of proportionality in F=ma?

Discussion

16.	A light rope is passed over a pulley such that at its one end a block is attached, and on the other end a boy is climbing up with acceleration g/2 relative to slope. Mass of block is 30kg and that of boy is 40kg. find tension and acceleration of the rope.
Answer» A light rope is passed over a pulley such that at its one end a block is attached, and on the other end a boy is climbing up with acceleration g/2 relative to slope. Mass of block is 30kg and that of boy is 40kg. find tension and acceleration of the rope.

Discussion

17.	The force of interaction between two atoms is given by F=αβe⎛⎜⎝−x2αkT⎞⎟⎠; where x is the distance, k is the Boltzmann constant and T is temperature and α and β are two constants. The dimension of β is:
Answer» The force of interaction between two atoms is given by $F = α β e^{⎛ ⎜ ⎝ - \frac{x^{2}}{α k T} ⎞ ⎟ ⎠};$ where $x$ is the distance, $k$ is the Boltzmann constant and $T$ is temperature and $α and β$ are two constants. The dimension of $β$ is:

Discussion

18.	A long wire of uniform linear charge density λ passes through a sphere of radius R as shown. Find net electric flux through the sphere.एकसमान रेखीय आवेश घनत्व λ का एक लम्बा तार दर्शाए अनुसार R त्रिज्या के एक गोले से गुजरता है। गोले से गुजरने वाला नेट विद्युत फ्लक्स ज्ञात कीजिए।
Answer» A long wire of uniform linear charge density λ passes through a sphere of radius R as shown. Find net electric flux through the sphere. एकसमान रेखीय आवेश घनत्व λ का एक लम्बा तार दर्शाए अनुसार R त्रिज्या के एक गोले से गुजरता है। गोले से गुजरने वाला नेट विद्युत फ्लक्स ज्ञात कीजिए।

Discussion

19.	Why does a proton reduce its potential energy when it moves from higher potential to lower potential?
Answer» Why does a proton reduce its potential energy when it moves from higher potential to lower potential?

Discussion

20.	20. If two straight current carrying wire are kept perpendicular to each other almost touching , then the wires will a. Attract b. Repel c. Remain stationary d. Become parallel .
Answer» 20. If two straight current carrying wire are kept perpendicular to each other almost touching , then the wires will a. Attract b. Repel c. Remain stationary d. Become parallel .

Discussion

21.	The magnetic moment of a small current carrying loop is 2.1×10−25amp×m2. The magnetic field at a point on its axis at a distance of 1∘A is
Answer» The magnetic moment of a small current carrying loop is $2.1 \times 10^{- 25} a m p \times m^{2} .$ The magnetic field at a point on its axis at a distance of $1 \circ A$ is

Discussion

22.	What will be the non-passing sight distance (in m) on highway for a design speed of 80 kmph when its ascending gradient is 3%? Assume brake efficiency as 50%, coefficient of friction as 0.7 and reaction time of 2.5 seconds.121.91
Answer» What will be the non-passing sight distance (in m) on highway for a design speed of 80 kmph when its ascending gradient is 3%? Assume brake efficiency as 50%, coefficient of friction as 0.7 and reaction time of 2.5 seconds. 121.91

Discussion

23.	Two point charges +4 q and +q are separated by distance r, where should a third point charge Q be placedthat the whole system remains in equilibrium.
Answer» Two point charges +4 q and +q are separated by distance r, where should a third point charge Q be placedthat the whole system remains in equilibrium.

Discussion

24.	During the 50 observations random error is 'α', how many random errors will there be during 150 observations?1) α2) 3α3) α/34) 2α
Answer» During the 50 observations random error is 'α', how many random errors will there be during 150 observations? 1) α 2) 3α 3) α/3 4) 2α

Discussion

25.	l. XIl Sci.: Perfect Physics -I.30. A galvanometer has a resistance of 16 Ω andgives a full scale deflection when a current of20 mA is passed through it. The only shuntresistance available is 0.04 Ω which is notappropriate to convert galvanometer into anammeter. How much resistance should beconnected in series with coil of galvanometer sothat the range of ammeter is 10 A?
Answer» l. XIl Sci.: Perfect Physics -I.30. A galvanometer has a resistance of 16 Ω andgives a full scale deflection when a current of20 mA is passed through it. The only shuntresistance available is 0.04 Ω which is notappropriate to convert galvanometer into anammeter. How much resistance should beconnected in series with coil of galvanometer sothat the range of ammeter is 10 A?

Discussion

26.	At a place, the earth's horizontal component of magnetic field is 0.36×10−4 weber/m2. If the angle of dip at that place is 45∘, then the vertical component of earth's magnetic field at that place in μT will be
Answer» At a place, the earth's horizontal component of magnetic field is $0.36 \times 10^{- 4} {weber/m}^{2}$ . If the angle of dip at that place is $45^{\circ}$ , then the vertical component of earth's magnetic field at that place in $μ T$ will be

Discussion

27.	A man of mass 40 kg is standing on a platform of 12 kg. If the man starts running at 6 m/s relative to the platform, the velocity of the platform relative to the ground is
Answer» A man of mass $40 kg$ is standing on a platform of $12 kg$ . If the man starts running at $6 m/s$ relative to the platform, the velocity of the platform relative to the ground is

Discussion

28.	36. If work function of two different metals is 2 eV and 4 eV respectively and wavelength of incident light is 2000 Aemstron then find the ratio of their stopping potential ?
Answer» 36. If work function of two different metals is 2 eV and 4 eV respectively and wavelength of incident light is 2000 Aemstron then find the ratio of their stopping potential ?

Discussion

29.	What is the moment of inertia of a wheel ?
Answer» What is the moment of inertia of a wheel ?

Discussion

30.	Two spherical balls of radii r1 and r2 (<r1) and densityρs are tied up with a long string and released in a long viscous liquid column of lesser density ρ with the string just taut as shown. The tension of the string when the terminal velocity is attained is
Answer» Two spherical balls of radii $r_{1}$ and $r_{2}$ $(< r_{1})$ and density $ρ_{s}$ are tied up with a long string and released in a long viscous liquid column of lesser density $ρ$ with the string just taut as shown. The tension of the string when the terminal velocity is attained is

Discussion

31.	A particle is moving with constant speed along line x=a in positive Y direction. Find angular velocity omega about origin when particle is at (a,b)
Answer» A particle is moving with constant speed along line x=a in positive Y direction. Find angular velocity omega about origin when particle is at (a,b)

Discussion

32.	A ladder of length L is slipping with its ends against a vertical wall and a horizontal floor. At a certain moment, the speed of the end in contact with the horizontal floor is v and the ladder makes an angle θ=30∘ with horizontal. Then, the speed of the ladder's centre of mass must be-
Answer» A ladder of length $L$ is slipping with its ends against a vertical wall and a horizontal floor. At a certain moment, the speed of the end in contact with the horizontal floor is $v$ and the ladder makes an angle $θ = 30^{\circ}$ with horizontal. Then, the speed of the ladder's centre of mass must be-

Discussion

33.	The gravitational potential due to earth at infinite distance from it is zero. Let the gravitational potential at a point P be −5 Jkg−1. Suppose, we arbitrarily assume the gravitational potential at infinity to be +10 Jkg−1 , then the gravitational potential at P will be
Answer» The gravitational potential due to earth at infinite distance from it is zero. Let the gravitational potential at a point $P$ be $- 5 {Jkg}^{- 1}$ . Suppose, we arbitrarily assume the gravitational potential at infinity to be $+ 10 {Jkg}^{- 1}$ , then the gravitational potential at $P$ will be

Discussion

34.	10. what is meant by Maxwellian distribution of energy in case of thermal neutrons?
Answer» 10. what is meant by Maxwellian distribution of energy in case of thermal neutrons?

Discussion

35.	An organ pipe P1 closed at one end is vibrating in its first overtone and another organ pipe P2 opened at both ends is vibrating in its third overtone are in resonance with a given tuning fork. The ratio of length of organ pipe P1 and P2 is
Answer» An organ pipe $P_{1}$ closed at one end is vibrating in its first overtone and another organ pipe $P_{2}$ opened at both ends is vibrating in its third overtone are in resonance with a given tuning fork. The ratio of length of organ pipe $P_{1}$ and $P_{2}$ is

Discussion

36.	In the circuit given below, the value of the current is
Answer» In the circuit given below, the value of the current is

36.

In the circuit given below, the value of the current is

Answer»

In the circuit given below, the value of the current is

Discussion

37.	ntA voltmeter of 998 ohms resistance is connected to a cell of 2 emf volts ,having internal resistance of 2 ohms ,the error in measuring emf will explain in detailn
Answer» ntA voltmeter of 998 ohms resistance is connected to a cell of 2 emf volts ,having internal resistance of 2 ohms ,the error in measuring emf will explain in detailn

Discussion

38.	Three charges +4q, Q and q are placed in a straightline of length / at points 0,l/2;l distance awayfrom one end respectively. What should be Q inorder to make the net force on q to be zero?
Answer» Three charges +4q, Q and q are placed in a straightline of length / at points 0,l/2;l distance awayfrom one end respectively. What should be Q inorder to make the net force on q to be zero?

Discussion

39.	A rod of length 25 cm is fixed vertically in a liquid beaker. The refractive index of the liquid is taken as 5/3 , then length of the rod as seen from the observer outside the beaker is
Answer» A rod of length 25 cm is fixed vertically in a liquid beaker. The refractive index of the liquid is taken as 5/3 , then length of the rod as seen from the observer outside the beaker is

Discussion

40.	A capacitor of capacity 2 μF is charged to a potential difference of 12 V. It is then connected across an inductor of inductance 0.6 mH. The current in the circuit at a time when the P.D. across the capacitor is 6 V is (in ampere).
Answer» A capacitor of capacity $2 μ F$ is charged to a potential difference of $12 V$ . It is then connected across an inductor of inductance $0.6 mH$ . The current in the circuit at a time when the P.D. across the capacitor is $6 V$ is (in ampere).

Discussion

41.	In a uniform magnetic field B, a wire in the form of a semicircle of radius r rotates about the diameter of the circle with an angular frequencyω. The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R, the mean power generated per period of rotation is
Answer» In a uniform magnetic field B, a wire in the form of a semicircle of radius r rotates about the diameter of the circle with an angular frequency $ω$ . The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R, the mean power generated per period of rotation is

Discussion

42.	A particle projected with an initial velocity u at angle θ from the ground. What is the work done by gravity during the time it reaches the highest point (P) in its path
Answer» A particle projected with an initial velocity $u$ at angle $θ$ from the ground. What is the work done by gravity during the time it reaches the highest point $(P)$ in its path

Discussion

43.	Tap on the bubbles for which the following trigonometric ratios are "negative".
Answer» Tap on the bubbles for which the following trigonometric ratios are "negative".

Discussion

44.	Consider two forces 6 N and 4 N as shown in below figure acting on an object in the opposite directions. The mass of the object is 2 kg. What is the acceleration of the object?
Answer» Consider two forces 6 N and 4 N as shown in below figure acting on an object in the opposite directions. The mass of the object is 2 kg. What is the acceleration of the object?

44.

Consider two forces 6 N and 4 N as shown in below figure acting on an object in the opposite directions. The mass of the object is 2 kg. What is the acceleration of the object?

Answer»

Consider two forces 6 N and 4 N as shown in below figure acting on an object in the opposite directions. The mass of the object is 2 kg. What is the acceleration of the object?

Discussion

45.	Some energy levels of a molecule are shown in the figure. The ratio of the wavelengths r=λ1λ2 is given by
Answer» Some energy levels of a molecule are shown in the figure. The ratio of the wavelengths $r = \frac{λ_{1}}{λ_{2}}$ is given by

Discussion

46.	What is gradient of electric potential? Whether it is a scalar or vector quantity
Answer» What is gradient of electric potential? Whether it is a scalar or vector quantity

Discussion

47.	A particle experience an acceleration a= (4e^-3t) m/s^2 along positive x axis where time t is in second. If the initial velocity of the particle is 2m/s along positive x axis the velocity of the particle when its acceleration becomes zero isa)5 m/sb)10 m/sc)6 m/sd)10/3 m/s
Answer» A particle experience an acceleration a= (4e^-3t) m/s^2 along positive x axis where time t is in second. If the initial velocity of the particle is 2m/s along positive x axis the velocity of the particle when its acceleration becomes zero is a)5 m/s b)10 m/s c)6 m/s d)10/3 m/s

Discussion

48.	11. A monochromatic point source of light is placedat a distance d from a metal surface. Photoelectrons are ejected at a rate n per second, andwith maximum kinetic energy E. If the source isbrought nearer to distance d/2, the rate and themaximum kinetic energy per photoelectronbecome nearly(1) 2n and 2E(2) 4n and 4E(3) 4n and E(4) n and 4E why the energy is not changing bcoz of rate become 4 times then frequency will also become 4tims
Answer» 11. A monochromatic point source of light is placedat a distance d from a metal surface. Photoelectrons are ejected at a rate n per second, andwith maximum kinetic energy E. If the source isbrought nearer to distance d/2, the rate and themaximum kinetic energy per photoelectronbecome nearly(1) 2n and 2E(2) 4n and 4E(3) 4n and E(4) n and 4E why the energy is not changing bcoz of rate become 4 times then frequency will also become 4tims

Discussion

49.	A tuning fork of frequency 340 Hz is vibrated just above a cylindrical tube. The length of the tube is 120 cm. Water is slowly poured into the tube. Determine the minimum height of water required for resonance. (Take velocity of sound in air v=340 m/s)
Answer» A tuning fork of frequency $340 Hz$ is vibrated just above a cylindrical tube. The length of the tube is $120 cm$ . Water is slowly poured into the tube. Determine the minimum height of water required for resonance. (Take velocity of sound in air $v = 340 m/s$ )

Discussion

50.	13.)A closely wound flat circular coil of 25 turns ofwire has diameter of 10 cm and carries a currentof 4 ampere. Determine the magnetic flux densityat the centre of the coil :-(1) 1.679 x 10-5 T (2) 2.028 x 104 T(3) 1.257 x 10-3 T (4) 1.512 x 10-6 T
Answer» 13.)A closely wound flat circular coil of 25 turns ofwire has diameter of 10 cm and carries a currentof 4 ampere. Determine the magnetic flux densityat the centre of the coil :-(1) 1.679 x 10-5 T (2) 2.028 x 104 T(3) 1.257 x 10-3 T (4) 1.512 x 10-6 T

Discussion

Explore topic-wise InterviewSolutions in Current Affairs.

How 3 dimensional vision is possible . Explain the principal used in 3 D lab .

11. The motion of a particle along a straight line is described by the function x= (2t-3)2 where x is in metre and t is in seconds . Find A) the velocity of the particle at origin

The critical angle of a medium for a specific wavelength if the medium has relative permittivity 3 and relative permeability 43 for this wavelength, will be:

Figure 3.24 gives the x-t plot of a particle in one-dimensional motion. Three different equal intervals of time are shown. In which interval is the average speed greatest, and in which is it the least? Give the sign of average velocity for each interval. (Fig: 3.24)

According to De Broglie 2πr=nλ where n is the quantum number of an orbit, in visual representation of an electron as a wave, n stands for:

The weight of 350 ml of a diatomic gas at zero degree Celsius and 2 ATM pressure is 1 gram the weight of one atom is

When charge of 3 coulomb is placed in a Uniform electric field, it experiences a force of 3000 newton, within this field, potential difference between two points separated by a distance of 1 cm is (in volt)

A simple pendulum of length l is suspended from the ceiling of a car moving with a speed v on a circular horizontal road of radius r. (a) Find the tension in the string when it is at rest with respect to the car. (b) Find the time period of small oscillation.

a bird flies for 2sec with velocity |t-1|m/s in a straight line, where t is in seconds. it covers a distance of

The deflection of a galvanometer falls to 1/10 th when a resis†an ce of 5 ohms is connected in parallel with it.If an additional resis†an ce of 2 ohms is connected in parallel to the galvanometer, the deflection is a) 1/6 th b) 1/16 th c) 2/65 th 4) 3/36 t

What is the graph between Momentum and mass*velocity?

why mass and charge for electrons is same always

An infinitely long solid cylinder of radius r has a uniform volume charge density rho. Magnitude of the electric field at point p which is at a distance r/2 from the axis of the cylinder

Why is there no constant of proportionality in F=ma?

A light rope is passed over a pulley such that at its one end a block is attached, and on the other end a boy is climbing up with acceleration g/2 relative to slope. Mass of block is 30kg and that of boy is 40kg. find tension and acceleration of the rope.

The force of interaction between two atoms is given by F=αβe⎛⎜⎝−x2αkT⎞⎟⎠; where x is the distance, k is the Boltzmann constant and T is temperature and α and β are two constants. The dimension of β is:

Why does a proton reduce its potential energy when it moves from higher potential to lower potential?

20. If two straight current carrying wire are kept perpendicular to each other almost touching , then the wires will a. Attract b. Repel c. Remain stationary d. Become parallel .

The magnetic moment of a small current carrying loop is 2.1×10−25amp×m2. The magnetic field at a point on its axis at a distance of 1∘A is

What will be the non-passing sight distance (in m) on highway for a design speed of 80 kmph when its ascending gradient is 3%? Assume brake efficiency as 50%, coefficient of friction as 0.7 and reaction time of 2.5 seconds.121.91

Two point charges +4 q and +q are separated by distance r, where should a third point charge Q be placedthat the whole system remains in equilibrium.

During the 50 observations random error is 'α', how many random errors will there be during 150 observations?1) α2) 3α3) α/34) 2α

At a place, the earth's horizontal component of magnetic field is 0.36×10−4 weber/m2. If the angle of dip at that place is 45∘, then the vertical component of earth's magnetic field at that place in μT will be

A man of mass 40 kg is standing on a platform of 12 kg. If the man starts running at 6 m/s relative to the platform, the velocity of the platform relative to the ground is

36. If work function of two different metals is 2 eV and 4 eV respectively and wavelength of incident light is 2000 Aemstron then find the ratio of their stopping potential ?

What is the moment of inertia of a wheel ?

Two spherical balls of radii r1 and r2 (&lt;r1) and densityρs are tied up with a long string and released in a long viscous liquid column of lesser density ρ with the string just taut as shown. The tension of the string when the terminal velocity is attained is

A particle is moving with constant speed along line x=a in positive Y direction. Find angular velocity omega about origin when particle is at (a,b)

A ladder of length L is slipping with its ends against a vertical wall and a horizontal floor. At a certain moment, the speed of the end in contact with the horizontal floor is v and the ladder makes an angle θ=30∘ with horizontal. Then, the speed of the ladder's centre of mass must be-

The gravitational potential due to earth at infinite distance from it is zero. Let the gravitational potential at a point P be −5 Jkg−1. Suppose, we arbitrarily assume the gravitational potential at infinity to be +10 Jkg−1 , then the gravitational potential at P will be

10. what is meant by Maxwellian distribution of energy in case of thermal neutrons?

An organ pipe P1 closed at one end is vibrating in its first overtone and another organ pipe P2 opened at both ends is vibrating in its third overtone are in resonance with a given tuning fork. The ratio of length of organ pipe P1 and P2 is

In the circuit given below, the value of the current is

ntA voltmeter of 998 ohms resistance is connected to a cell of 2 emf volts ,having internal resistance of 2 ohms ,the error in measuring emf will explain in detailn

Three charges +4q, Q and q are placed in a straightline of length / at points 0,l/2;l distance awayfrom one end respectively. What should be Q inorder to make the net force on q to be zero?

A rod of length 25 cm is fixed vertically in a liquid beaker. The refractive index of the liquid is taken as 5/3 , then length of the rod as seen from the observer outside the beaker is

A capacitor of capacity 2 μF is charged to a potential difference of 12 V. It is then connected across an inductor of inductance 0.6 mH. The current in the circuit at a time when the P.D. across the capacitor is 6 V is (in ampere).

In a uniform magnetic field B, a wire in the form of a semicircle of radius r rotates about the diameter of the circle with an angular frequencyω. The axis of rotation is perpendicular to the field. If the total resistance of the circuit is R, the mean power generated per period of rotation is

A particle projected with an initial velocity u at angle θ from the ground. What is the work done by gravity during the time it reaches the highest point (P) in its path

Tap on the bubbles for which the following trigonometric ratios are "negative".

Consider two forces 6 N and 4 N as shown in below figure acting on an object in the opposite directions. The mass of the object is 2 kg. What is the acceleration of the object?

Some energy levels of a molecule are shown in the figure. The ratio of the wavelengths r=λ1λ2 is given by

What is gradient of electric potential? Whether it is a scalar or vector quantity

A particle experience an acceleration a= (4e^-3t) m/s^2 along positive x axis where time t is in second. If the initial velocity of the particle is 2m/s along positive x axis the velocity of the particle when its acceleration becomes zero isa)5 m/sb)10 m/sc)6 m/sd)10/3 m/s

A tuning fork of frequency 340 Hz is vibrated just above a cylindrical tube. The length of the tube is 120 cm. Water is slowly poured into the tube. Determine the minimum height of water required for resonance. (Take velocity of sound in air v=340 m/s)

13.)A closely wound flat circular coil of 25 turns ofwire has diameter of 10 cm and carries a currentof 4 ampere. Determine the magnetic flux densityat the centre of the coil :-(1) 1.679 x 10-5 T (2) 2.028 x 104 T(3) 1.257 x 10-3 T (4) 1.512 x 10-6 T

Two spherical balls of radii r1 and r2 (<r1) and densityρs are tied up with a long string and released in a long viscous liquid column of lesser density ρ with the string just taut as shown. The tension of the string when the terminal velocity is attained is