List of top Physics Questions

If a body is performing uniform circular motion with velocity \( v \) and radius \( R \), then identify the true statements from the following:
A. Its velocity \( v \) is constant.
B. Acceleration is always directed towards the centre and its magnitude is \( a = \frac{v^2}{R} \).
C. Angular momentum is constant in magnitude but its direction keeps changing.
D. Angular velocity of the body \( = \frac{v}{R} \). 
Choose the most appropriate answer from the options given below.

Two parallel plate capacitors each of 15 µF capacity are connected in series. The space between the plates of one capacitor is filled with a dielectric material of dielectric constant \( K = 2 \). The equivalent capacitance of the system will be:
A proton and a deuteron moving with equal kinetic energy enter perpendicularly into a magnetic field. What will be the ratio of radii of the circular path of the proton to that of the deuteron?
A big oil droplet of radius 10 cm is broken into a thousand equal droplets. What will be the gain in surface energy? (Surface tension of the oil is 0.1 N/m)
The electric charge on a body is always an integral multiple of 'e' where 'e' is the charge that an electron or proton carries. This concept is known as
Assume that a narrow tunnel is dug between two diametrically opposite points on the earth's surface. If a particle is released in this tunnel, it will execute simple harmonic motion. What will be the time period of SHM of this particle?
A train passes a standing man in 6 seconds and 210 m long platform in 16 seconds. The length and speed of the train, respectively, is:
A bullet of mass 20 g, moving at 50 m/s penetrates 20 cm into a wooden block. What is the magnitude of the force exerted on the wooden block?
Splitting of white light into VIBGYOR colours is called
Pick the correct answer from the following two statements :
  1. Ohm's law is applicable to semiconductors.
  2. Ohm's law is applicable to metallic conductors.
A light ray bends away from normal when it travels from
If 25 cm each is the object and image distances due to convex lens, then its focal length is
Irrespective of the position of the object on the principal axis, a concave lens always forms an image of nature
The magnetic force acting on a moving charge in a magnetic field is the product of three quantities namely
Three resistors each of 4 Ω, 0.4 Ω and 0.04 Ω are connected in series combination. Their equivalent resistance is
The pair of substances which have the same value of specific heat is
Faraday's laws of electromagnetic induction is a consequence of
The angle between paraxial rays and principal axis is
For a normal human-eye, 2.5 cm is the distance between
The phenomenon of electromagnetic induction involves the process of
The relationship between current and voltage is established by the scientist
In a single-slit diffraction experiment, the slit is illuminated by light of two wavelengths \(\lambda_1\) and \(\lambda_2\). It is observed that the 2nd order diffraction minimum for \(\lambda_1\) coincides with the 3rd diffraction minimum for \(\lambda_2\). Then:
The internal energy of a thermodynamic system is given by \( U = a s^{4/3} v^\alpha \), where \( s \) is entropy, \( v \) is volume, and \( a \) and \( \alpha \) are constants. The value of \( \alpha \) is:
Which of the following quantity has the dimension of length? (where \(h\) is Planck’s constant, \(m\) is the mass of electron and \(c\) is the velocity of light):
Light of wavelength \(6000 \, \text{Å}\) is incident on a thin glass plate of refractive index \(1.5\) such that the angle of refraction into the plate is \(60^\circ\). Calculate the smallest thickness of the plate which will make a dark fringe by reflected beam interference.