List of top Physics Questions

A certain elastic conducting material is stretched into a circular loop. It is placed with its plane perpendicular to a uniform magnetic field B = 0.8 T. When released the radius of the loop starts shrinking at a constant rate of 2 cm/s. The induced emf in the loop at an instant when the radius of the loop is 10 cm will be _____ mV.

Two simple harmonic waves having equal amplitudes of 8 cm and equal frequency of 10 Hz are moving along the same direction. The resultant amplitude is also 8 cm. The phase difference between the individual waves is _____ degree.
A body cools from \(60\degree C\) to \(40\degree C\) in 6 minutes. If, temperature of surroundings is \(10\degree C\). Then, after the next 6 minutes, its temperature will be ______\(\degree C\).
In a metre bridge experiment, the balance point is obtained if the gaps are closed by \(2 \Omega\) and \(3 \Omega\). A shunt of \(X \Omega\) is added to \(3 \Omega\) resistor to shift the balancing point by 22.5 cm. The value of X is _______ .
A point charge \(q_1 = 4q_0\) is placed at origin. Another point charge \(q_2 = –q_0\) is placed at \(x = 12\text{ cm}\). Charge of proton is q0. The proton is placed on x axis so that the electrostatic force on the proton is zero. In this situation, the position of the proton from the origin is _____ cm.
Ques Fig
A monochromatic light wave with wavelength \(λ_1\) and frequency \(v_1\) in air enters another medium. If the angle of incidence and angle of refraction at the interface are 45° and 30° respectively, then the wavelength \(λ_2\) and frequency \(v_2\) of the refracted wave are : 
A long straight wire of circular cross-section (radius a) is carrying steady current I. The current I is uniformly distributed across this cross-section. The magnetic field is 

Three identical polaroids \(P_1\), \(P_2\), and \(P_3\) are placed one after another. The pass axis of \(P_2\) and \(P_3\) are inclined at angles of \(60^\circ\) and \(90^\circ\) with respect to the axis of \(P_1\). The source \(S\) has an intensity of \(\frac{256 \, \text{W}}{\text{m}^2}\). The intensity of light at point \(O\) is _____ \(\frac{\text{W}}{\text{m}^2}\).
Ques Fig

A 0.4 kg mass takes 8 s to reach ground when dropped from a certain height ‘P’ above surface of earth. The loss of potential energy in the last second of fall is ____ J. (Take g = 10 m/s2)
The kinetic energy of an electron, α-particle and a proton are given as 4K, 2K and K respectively. The de-Broglie wavelength associated with electron (λe) α-particle (λα) and the proton (λp) are as follows :
Given below are two statements:
Statement I: If heat is added to a system, its temperature must increase.
Statement II: If positive work is done by a system in a thermodynamic process, its volume must increase.
In the light of the above statements, choose the correct answer from the options given below
A parallel plate capacitor with plate area A and plate separation d is filed with a dielectric material of dielectric constant K = 4. The thickness of the dielectric material is x, where \(x < d\).
A parallel plate capacitor with plate area A
Let C1 and C2 be the capacitance of the system for \(x=\frac{1}{3d}\) and \(x=\frac{2d}{3}\), respectively. If \(C_1 = 2μF\), the value of C2 is __________μF.
An aluminium rod with Young's modulus Y=7.0×1010 N/m2 undergoes elastic strain of 0.04%. The energy per unit volume stored in the rod in SI unit is:
At any instant the velocity of a particle of mass 500 g is \((2t\hat{i}+3t^2\hat{j}) ms^{-1}\). If the force acting on the particle at t=1s is \((\hat{i} + x\hat{j})N\). Then the value of x will be:
Given below are two statements:
Statement I: If E be the total energy of a satellite moving around the earth, then its potential energy will be \(\frac{E}{2}\)
Statement II: The kinetic energy of a satellite revolving in an orbit is equal to the half the magnitude of total energy E.
In the light of the above statements, choose the most appropriate answer from the options given below
For the logic circuit shown, the output waveform at Y is:
For the logic circuit shown, the output waveform

Equivalent resistance of the following circuit (in ohms) is equal to \(\frac{x}{7}\). Value of x is equal to _____.
 

Equivalent resistance of the following circuit
Two satellites of masses m and 3m revolve around the earth in circular orbits of radii r & 3r respectively. The ratio of orbital speeds of the satellites respectively is
Two wires each of radius 0.2 cm and negligible mass, one made of steel and other made of brass are loaded as shown in the figure. The elongation of the steel wire is _____ x 10-6 m .
Two wires each of radius 0.2 cm and negligible mass
[Young’s modulus for steel = 2 x 1011 Nm-2 and g = 10ms-2]
For a particle performing linear SHM, its position (x) as a function of time (t) is given by x = Asin(ωt + δ). Given that, at t = 0, particle is at +A/2 and is moving towards x = +A. Find δ
A transverse harmonic wave on a string is given by y(x,t) = 5 sin(6t + 0.003x) where x and y are in cm and t in sec. The wave velocity is _______ ms-1 
Given below are two statement :  
Statement I : If the number of turns in the coil of a moving coil galvanometer is doubled then the current sensitivity becomes double.  
Statement II : Increasing current sensitivity of a moving coil galvanometer by only increasing the number of turns in the coil will also increase its voltage sensitivity in the same ratio.
In the light of the above statement, choose the correct answer from the options given below : 
Given below are two statements:  
Statement I : Pressure in a reservoir of water is same at all points at the same level of water.  
Statement II : The pressure applied to enclosed water is transmitted in all directions equally. 
In the light of the above statements, choose the correct answer from the options given below : 
A carrier wave of amplitude 15 V modulated by a sinusoidal base band signal of amplitude 3 V. The ratio of maximum amplitude to minimum amplitude in an amplitude modulated wave is
A zener diode of power rating 1.6 W is used as a voltage regula tor. If the zener diode has a breakdown voltage of 8 V and it has to regulate voltage fluctuating between 3 V and 10 V, what is the value of resistance Rs for safe operation of the diode?
zener diode of power rating