List of practice Questions

At a distance \( r \), two equal charges are kept and they exert a force \( F \) on each other. What is the force acting on each charge, if the distance between them is doubled and charges are halved?
For a hollow spherical shell, potential \( V \) changes with respect to distance \( r \) from the centre. Which graph from the following represents this?
What does an electric dipole experience when it is kept in a non-uniform electric field?
The image formed by the convex mirror is \( \frac{1}{n} \) times the object and has a focal length \( f \). What is the distance of the object from the mirror?
Which of the following does not exhibit polarization?
A spring has a spring constant \( k \). When the spring is stretched through 1 cm, the potential energy is \( U \). What will be the potential energy if it is stretched by 4 cm?
What will be the flux coming out of any surface of a cube, if a charge \( Q\,\mu\text{C} \) is placed at the centre of the cube?
Efficiency of a Carnot heat engine working between the temperatures \(27^\circ \text{C}\) and \(227^\circ \text{C}\) is –
Which of the following is the largest unit of energy?
Curie temperature is the temperature above which –
The total energy of a rolling ring of mass \( M \), velocity \( V \), and radius \( R \) is -
When the angle of contact between a solid and a liquid is \( 90^\circ \), then
A body of mass \( m \) moving with a constant velocity \( v \) hits another body of the same mass moving with the same velocity \( v \) but in the opposite direction and sticks to it. The velocity of the compound body after the collision is
Which is a constant for a freely falling object?
The frame of reference attached to a satellite of the earth is
Plane angle and solid angle have –
The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom is –
What is the need for laminating the core of a transformer?
Number of significant figures in 42306, 0.0007 and \(6.5 \times 10^{-3}\) are respectively.
The Recommendations of Sarkaria Commission relates to _______.
Constitutional morality emphasizes which of the following core values?
International Humanitarian Law is ______.
The Advisory jurisdiction of the Supreme Court is provided under which provision of Indian Constitution?
"Apartheid" term came to be linked with practice of discrimination in which of the following countries?
The right of lien allows an unpaid seller to __________.