Recent questions in Physics

0 votes

3 answers

A charged particle of mass \(m\) and charge \(q\) is released from rest in an electric field of constant magnitude E. The kinetic energy of the particle after time t is :-

asked Dec 20, 2021 in Kinematics by kritika (90.1k points)

0 votes

3 answers

One mole of an ideal monatomic gas undergoes a process described by the equation PV \(^{3}=\) constant. The heat capacity of the gas during this process is

asked Dec 20, 2021 in Kinematics by kritika (90.1k points)

0 votes

1 answer

Two identical photocathodes receive light of frequencies \(f_{1}\) and \(f_{2}\). If the velocities of the photoelectrons (of mass \(m\) ) coming out are respectively \(v_{1}\) and \(v_{2}\), then

asked Dec 20, 2021 in Kinematics by kritika (90.1k points)

0 votes

4 answers

Two beams of light having intensities \(I\) and 41 interfere to produce a fringe pattern on a screen. (The phase difference between beam is ( \(\pi / 2)\) at the point \(A\) and \(\pi\) at point B.)

asked Dec 20, 2021 in Kinematics by kritika (90.1k points)

0 votes

4 answers

The pair of quantities having same dimensions is

asked Dec 20, 2021 in Kinematics by kritika (90.1k points)

0 votes

3 answers

A capillary tube of radius \(r\) is immersed in water and water rises in it to a height \(h\). The mass of water in the capillary tube is \(5 \mathrm{~g}\). Another capillary tube of radius \(2 r\) is immersed in water. The mass of water that will rise in this tube is

asked Dec 20, 2021 in Kinematics by kritika (90.1k points)

0 votes

3 answers

A freshly Prepared radioactive source of half life 2 h emits radiation of intensity which is 64 times the Permissible safe level. The minimum time after which is would be possible to work safely with this source is.

asked Dec 20, 2021 in Kinematics by kritika (90.1k points)

0 votes

1 answer

Two point charges \(A\) and \(B\), having charges \(+Q\) and \(-Q\) respectively, are placed at certain distance apart and force acting between them is \(\mathrm{F}\). If \(25 \%\) charge of \(A\) is transferred to \(B\), then force between the charges becomes:

asked Dec 20, 2021 in Kinematics by kritika (90.1k points)

0 votes

3 answers

A galvanometer of resistance \(50 \Omega\) is connected to a battery of \(3 \vee\) along with a resistance of \(2950 \Omega\) in series. A full scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions. the resistance in series should be

asked Dec 20, 2021 in Kinematics by kritika (90.1k points)

0 votes

3 answers

The power radiated by a black body is \(P\) and it radiates maximum energy at wavelength \(\Lambda_{0}\). If the temperature of the black body is now changed so that it radiates maximum energy at wavelength \(3 / 4 \wedge_{0}\), the power radiated by it becomes \(n \mathrm{P}\). The value of \(n\) is :-

asked Dec 20, 2021 in Kinematics by kritika (90.1k points)

0 votes

3 answers

A long solenoid has 500 turns. When a current of 2 ampere is passed through it, the resulting magnetic flux linked with each turn of the solenoid is \(4 \times 10^{-3} \mathrm{~Wb}\). The selfinductance of the solenoid is

asked Dec 20, 2021 in Kinematics by kritika (90.1k points)

0 votes

1 answer

A magnetic needle lying parallel to a magnetic field requires \(W\) units of work to turn it through \(60^{\circ}\). The torque needed to maintain the needle in this position will be

asked Dec 20, 2021 in Kinematics by kritika (90.1k points)

0 votes

1 answer

Give the relation between electric field and electric potential.

asked Dec 19, 2021 in Kinematics by kritika (90.1k points)

0 votes

1 answer

In optics an object which has higher refractive index is called

asked Dec 19, 2021 in Kinematics by kritika (90.1k points)

0 votes

2 answers

a) State the law of conservation of momentum. b) Discuss the conservation of momentum in each of the following cases:

asked Dec 18, 2021 in Kinematics by kritika (90.1k points)

0 votes

3 answers

The following four wires are made of the same material. Which of these will have the largest extension when the same tension is applied?

asked Dec 18, 2021 in Kinematics by kritika (90.1k points)

0 votes

1 answer

Earthing is necessary to give protection against

asked Dec 18, 2021 in Kinematics by kritika (90.1k points)

0 votes

2 answers

A fully charged capacitor \(C\) with initial charge \(q_{0}\) is connected to a coil of self inductance \(L\) at \(t=0\). The time at which the energy is stored equally between the electric and the magnetic fields is

asked Dec 18, 2021 in Kinematics by kritika (90.1k points)

0 votes

1 answer

To increase sensitivity of a potentiometer, its

asked Dec 18, 2021 in Kinematics by kritika (90.1k points)

0 votes

1 answer

What are the Relation between current and drift velocity ?

asked Dec 18, 2021 in Kinematics by kritika (90.1k points)

Recent questions in Physics

Categories