List of top Physics Questions

According to the laws of reflection:
Which of the following temperatures is the highest?
Among identical spheres A and B having charges as \(-5\,\text{C}\) and \(-16\,\text{C}\):
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.
Which of the following pairs may give equal numerical values of the temperature of human body?
The velocity of sound is largest in:
Buoyant force on an object due to fluid always acts:
Which of the following is carried by waves from one place to another?
The acceleration due to gravity:
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 \(= 10^3\,\text{kg/m}^3\)):
Friction forces act:
The force of gravitation between two bodies does not depend on:
The effect of frictional force may be minimized by:
A stone of mass \(1\,\text{kg}\) is raised through \(1\,\text{m}\) height.
The centre of mass of a rigid body lies:
The motion of the centre of mass depends on:
If a body is moving at constant speed in a circular path, its:
Temperature can be expressed as derived quantity in terms of:
Electron volt is a unit of:
If a car is traveling north on a straight road and its brakes are applied, it will:
In a hydraulic lift, the surface area of the input piston is 6 cm² and that of the output piston is 1500 cm². If 100 N force is applied to the input piston to raise the output piston by 20 cm, then the work done is kJ.
The maximum speed of a boat in still water is 27 km/h. Now this boat is moving downstream in a river flowing at 9 km/h. A man in the boat throws a ball vertically upwards with speed of 10 m/s. Range of the ball as observed by an observer at rest on the river bank is cm. (Take g = 10 m/s²).
The coordinates of a particle with respect to origin in a given reference frame is \( (1, 1, 1) \) meters. If a force of \( \mathbf{F} = \hat{i} - \hat{j} + \hat{k} \) acts on the particle, then the magnitude of torque (with respect to origin) in the z-direction is:
A satellite of mass 1000 kg is launched to revolve around the earth in an orbit at a height of 270 km from the earth's surface. Kinetic energy of the satellite in this orbit is ______ x $10^{10}$ J.
(Mass of earth = $6 \times 10^{24}$ kg, Radius of earth = $6.4 \times 10^6$ m, Gravitational constant = $6.67 \times 10^{-11}$ Nm$^2$ kg$^{-2}$)
The length of a light string is 1.4 m when the tension on it is 5 N. If the tension increases to 7 N, the length of the string is 1.56 m. The original length of the string is ______ m.