List of practice Questions

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?
Which of the following does not exhibit polarization?
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 –
What is the time taken by a particle executing SHM with a time period \( T \) sec from a positive extreme position to half of the amplitude?
Choose the correct statement
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
The equation of trajectory of a projectile is given by \( y = x - 10x^2 \). Its speed of projection is – \((g = 10 \, \text{m/s}^2)\)
What happens to the weight of the body if the weight becomes \( \frac{1}{16} \) at a certain height? Also, consider the radius of the Earth to be \( R \).
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
Plane angle and solid angle have –
The frame of reference attached to a satellite of the earth is
The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom is –
Which is a constant for a freely falling object?
Number of significant figures in 42306, 0.0007 and \(6.5 \times 10^{-3}\) are respectively.
What is the need for laminating the core of a transformer?
The angle between centripetal acceleration and tangential acceleration is.
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?