List of top Physics Questions

Which section of research proposal provides background information and a critique of previous research done on the topic?

If two simple harmonic motions having angular frequency 440 rad/s and 396 rad/s are superimposed, what will be the number of beats produced?

Find the output voltage of a non-inverting OP-AMP having \(R_1\) = 100 kΩ, \(R_f\) = 500 kΩ, when the input signal is of 2.0 V.

The Lissajous figure may be a straight line if the phase difference is

In single pulse modulation of PWM inverter, third harmonic can be eliminated if pulse width is equal to

Which of the following statements is/ an false?
(A) Solder is an alloy of tin and lead.
(B) Ductile materials result in continuous chip with Built up edge.
(C) Stellites are alloys of cobalt, chromium and vanadium.
(D) Electron beam machining does not require vaccum.
(E) In Plasma arc maching, MRR [Material Removal Rate] is higher then EDM and laser machining.
Choose the correct answer from the options given below:

A metal has work function \(w_0\) = 3.3×10^-19 J. What should be the minimum frequency of the incident radiation that can remove an electron from the metal surface? [Given h = 6.6x10^-34 J-s]

Which methods you will prefer to estimate best the area of an irregular and curved boundary ?

The true length of a line is known to be 200m. When this is measured with a 20m tape, the length is 200.80m. The correct length of the 20m tape is.

Given below are two statements:
Statement - I: The formula of correct length is \(\frac{\text{Measure of length}}{\text{Nominal length of Tape}}\) × Actual length of tape.
Statement - II: The formula of sag correction is - \(\frac{-W^2}{24P^2}\times L\).
In the light of the above statements, choose the correct answer from the options given below :

In Force current analogy, stiffness constant K is analogous to__

Given below are two statements:
Statement-I : Law of conservation of momentum is invariant to Galilean transformation.
Statement-II Law of conservation of energy is invariant to Galilean transformation.
In the light of the above statements, choose the correct answer from the options given below.

What will be the spring constant of a spring? When it is streched 10 cm, it has potential energy of 5600 J.

Gravitational force between two masses \(m_1\) and \(m_2\) separated by a distance r is
A. central force
B. non-central force
C. attractive force
D. repulsive force
E. directly proportional to the distance between \(m_1\) and \(m_2\)
Choose the correct answer from the options given below.

The general form of a central force is represented by \(\overrightarrow F = \frac{C}{r^n}\hat r\) (C = constant) known as Inverse Power law. 
A. The force represented by above equation will be attractive if C < 0.
B. The force represented by above equation will repulsive if C < 0.
C. The force represented by above equation will be repulsive if C > 0.
D. The force represented by above equation will be attractive if C > 0.
Choose the correct answer from the options given below.

There are three planets in circular orbits around a star at a distance a, 9a and 16a respectively. At time t = \(t_0\), the star and the planets are in a straight line. The period of revolution of the closest planet is T. How long after \(t_0\), will they again be in the same line?

What will be the expression for moment of inertia of a rectangular lamina (ABCD having length \(l\) and breadth b) about an axis passing through one of its corners and perpendicular to its plane?

Match List I with List II

Choose the correct answer from the options given below:

The work done in a gravitational field between two points does not depend upon the path between these points. The field

Given below are two statements:
Statement-I In case of bi-prism, the coherent sources are produced by the phenomenon of refraction.
Statement-II: In case of Llyod mirror, coherent sources are produced by the phenomenon of reflection.
In the light of the above statements, choose the correct answer from the options given below.

The angular speed of a motor wheel is increased from 1200 r.p.m. to 3120 r.p.m. in 16 s. What is its angular acceleration?

A bullet of mass 10 g moving horizontally with a speed of 500 m/s passes through a block of wood of mass 1 kg, initially at rest on a frictionless surface. The bullet comes out of the block with a speed of 200 m/s. What is the final speed of the block?

An infinite long wire is stretched horizontally 4 m above the surface of the earth. It has a charge of 1.0 micro-coulomb (µC) per cm of its length. The value of electric field at a point on earth vertically below the wire is

What is the value of div \(\overrightarrow r\), if \(\overrightarrow r\) is the position vector of a particle?
\(\left (\overrightarrow r = x\hat i + y\hat j + z\hat k\right)\)

Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): A given vector \(\overrightarrow{F}\) is irrotational i.e.,\(\overrightarrow{\nabla} ×\overrightarrow{F}\) =0.
Reason (R): The vector \(\overrightarrow{F}\) is conservative.
In the light of the above statements, choose the most appropriate answer from the options given below.