List of top Physics Questions

In an experiment for determination of the focal length of a thin convex lens, the distance of the object from the lens is 10 ± 0.1 cm and the distance of its real image from the lens is 20 ± 0.2 cm. The error in the determination of focal length of the lens is 𝑛 %. The value of 𝑛 is ____ .

Match List I with List II:

List - I		List - II
A.	Torque	I.	kg m^-1 s^-2
B.	Energy Density	II.	kg ms^-1
C.	Pressure gradient	III.	kg m^-2 s^-2
D.	Impulse	IV.	kg m² s^-2

Choose the correct answer from the options given below :

The velocity of a particle having a magnitude of 10 ms^-1 in the direction of 60° with positive X-axis is

Expression for an electric field is given by $\overrightarrow{ E }=4000 x^2 i \frac{ V }{ m }$ The electric flux through the cube of side $20 cm$ when placed in electric field (as shown in the figure) is ___$V cm$

A ball falls freely from a height h on a rigid horizontal plane. If the coefficient of resolution is e, then the total distance travelled by the ball before hitting the plane second time is:

The current in a coil changes from 2A to 5A in 0.3s. The magnitude of emf induced in the coil is 1.0V. The value of self-inductance of the coil is

When a spring is stretched by x amount, the potential energy stored in it is E. When the spring is stretched by another x amount, the potential energy stored in the spring becomes E'. Then $\frac{E'}{E}$ is,

The intensity of gravitational field of earth is maximum at the _______

A point source of light is used in a photoelectric effect. If the source is removed farther from the emitting metal, the stopping potential

The horizontal component of the earth’s magnetic field can be represented as

Three wires of equal lengths are bent in the form of loops. One of the loops is a circle, another is a semi-circle and the third one is a square. They are placed in a uniform magnetic field and the same electric current is passed through them. Which of the following loop configuration will experience greater torque?

Three capacitances 3$\mu$F, 9$\mu$F, and 18$\mu$F are connected once in series and then in parallel. The ratio of equivalent Cs/Cр will be:

The number of protons or atomic number is reduced to 2 by which form of radioactive decay?

Why is the Wheatstone bridge better than the other methods of measuring resistances?

In general, as the temperature increases, the electron work function of metal would

If V_A and VV_B are the potentials of the two points A and B, what will be the correct relation between the electric field and the potential difference between the points? The distance between the points is d.