Physics questions
20027 published questions with worked solutions.
- A ball whose kinetic energy is E, is projected at an angle of 45^ to the horizontal. The kinetic energy of the ball at the...
- Two identical particles move towards each other with velocity 2v and v respectively. The velocity of centre of mass is
- Initial angular velocity of a circular disc of mass M is _1. Then two small spheres of mass m are attached gently to...
- A solid sphere, a hallow sphere and a ring are released from top of an inclined plane (frictionless) so that they slide down the...
- Moment of inertia of a circular wire of mass M and radius R about its diameter is
- The kinetic energy needed to project a body of mass m from the earth surface (radius R) to infinity is
- If suddenly the gravitational force of attraction between Earth and a satellite revolving around it becomes zero, then the...
- Energy required to move a body of mass m from an orbit of radius 2R to 3R is
- The escape velocity of a body depends upon mass as
- A cylinder of height 20 m is completely filled with water. The velocity of efflux of water (in ms^ -1 ) through a small hole on...
- Which of the following is more closed to a black body?
- Even Carnot engine cannot give 100% efficiency because we cannot
- Cooking gas containers are kept in a lorry moving with uniform speed. The temperature of the gas molecules inside will
- 1 mole of a gas with = 7/5 is mixed with 1 mole of a gas with = 5/3, then the value of for the resulting mixture is
- In a simple harmonic oscillator, at the mean position
- If a spring has time period T, and is cut into n equal parts, then the time period of each part will be
- A child swinging on a swing in sitting position, stands up, then the time period of the swing will
- Length of a string tied to two rigid supports is 40 cm. Maximum length (wave length in cm) of a stationary wave produced on it is
- A tuning fork arrangement (pair) produces 4 beats / sec with one fork of frequency 288cps. A little wax is placed on the unknown...
- A wave y = a ( t - kx) on a string meets with another wave producing a node at x = 0. Then the equation of the unknown wave is