List of top Physics Questions

A satellite is launched into a circular orbit of radius \( R \) around the earth. A second satellite is launched into an orbit of radius \( 1.03R \). The time period of revolution of the second satellite is larger than the first one approximately by:
The above battery sends a current \( I_1 \) when \( R = R_1 \) and a current \( I_2 \) when \( R = R_2 \). Obtain the internal resistance of the battery in terms of \( I_1 \), \( I_2 \), \( R_1 \), and \( R_2 \).
What are majority and minority charge carriers of p-type and n-type semiconductors?
A plane wave travelling in a medium is incident on a plane surface separating this medium from a rarer medium. Draw a diagram to show refraction of the wave. Hence, verify Snell’s law.
Define ‘wavefront’ of a light wave. A plane wavefront is refracted from a convex lens. Draw the shape of the refracted wavefront.
State any three characteristics of electromagnetic waves.
Differentiate between magnetic flux through an area and magnetic field at a point.
How will the magnetic field inside a long solenoid be affected when:
(i) the radius of the turns of the solenoid is increased,
(ii) the length of the solenoid as well as the total number of its turns are doubled?
A block of mass 5 kg is placed on a frictionless surface and pushed with a force of 20 N at an angle of 30° to the horizontal. What is the acceleration of the block?
Which of the following is a false statement?
G. P. Thomson experimentally confirmed the existence of matter waves by the phenomenon of:
The phenomenon that best supports the theory that matter has a wave nature is:
Which of the following temperatures is the highest?
Among the following statements:

A discharge lamp uses a discharge tube which is filled with a gas at a very low pressure.
Always white light is emitted independent of gas taken in the lamp.
Among identical spheres A and B having charges as \(-5\,\text{C}\) and \(-16\,\text{C}\):
For an object at infinity, a concave mirror produces an image at its focus which is:
According to the laws of reflection:
Direction of conventional current is from:
A wooden cube floating in water supports a mass \(m = 0.2\,\text{kg}\) on its top. When the mass is removed, the cube rises by \(2\,\text{cm}\). The side of the cube is (density of water \(= 10^3\,\text{kg/m}^3\)):
Which of the following is carried by waves from one place to another?
Buoyant force on an object due to fluid always acts:
The acceleration due to gravity:
Which of the following pairs may give equal numerical values of the temperature of human body?
The velocity of sound is largest in:
The motion of the centre of mass depends on: