List of top Physics Questions

A neutral water molecule is placed in an electric field $ E = 2.5 \times 10^4 \, \text{N/C} $. The work done to rotate it by 180° is $ 5 \times 10^{-25} \, \text{J} $. Find the approximate separation of the center of charges.
The binding energy per nucleon for $^{12}C$ is 7.68 MeV and that for $^{13}C$ is 7.47 MeV. The energy required to remove a neutron from $^{13}C$ is
The distance of closest approach when an alpha particle of kinetic energy 6.5 MeV strikes a nucleus of atomic number 50 is
The lowest frequency of the air column in an open pipe of length \( L \) is \( v \) (velocity of sound in air)
According to the molecular orbital theory, which of the following molecules should exhibit paramagnetism?

Identify which of the following statements regarding significant figures are correct. 
A. 6.405 has four significant figures. 
B. 12300 has five significant figures. 
C. 0.00421 has five significant figures. 
D. 4.500 has four significant figures. 
Choose the most appropriate answer from the options given below.

A boy sitting on a surface inside a satellite moving around the earth feels weightless because
Identify the statement which is NOT true for a 'conservative force'.

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)
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?
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.
The phenomenon of electromagnetic induction involves the process of
The angle between paraxial rays and principal axis is
If 25 cm each is the object and image distances due to convex lens, then its focal length is
The pair of substances which have the same value of specific heat is
Splitting of white light into VIBGYOR colours is called
The relationship between current and voltage is established by the scientist
For a normal human-eye, 2.5 cm is the distance between
The magnetic force acting on a moving charge in a magnetic field is the product of three quantities namely
A light ray bends away from normal when it travels from