List of top Physics Questions

Angular momentum of the particle rotating with a central force is constant due to

The escape velocity of a body depends upon mass as:

A particle is moving with a velocity \( \vec{v} = K (y \hat{i} + x \hat{j} )\), where \( K \) is a constant. The general equation for its path is:

A smooth chain of length 2 m is kept on the table such that its length of 60 cm hangs freely from the edge of the table . The total mass of the chain is 4 kg. The work done in pulling the entire chain on the table is. ( Take g = 10 m/s²)

A car is moving in a circular horizontal track of radius 10 m with a constant speed of 10 m/s^-1. A bob is suspended from the roof of the car by a light wire of length 1.0 m. The angle made by the wire with the vertical is (in radian)

The displacement 'x' (in metre) of a particle of mass 'm' ( in kg) moving in one dimension under the action of force, is related to time 't' ( in sec) by, t = √x+3. The displacement of the particle when its velocity is zero, will be

The vernier scale of travelling microscope has 50 divisions which coincides with 49 main scale division. If each main scale division is 0.5 mm, then the least count of the microscope is

The forbidden energy gap for 'Ge' crystal at '0' K is

The resistivity of semiconductor at room temperature is between

Which of the following radiations is deflected by electric field?

The radius of hydrogen atom in the ground state is 0.53 Å .After collision with an electron it is found to have a radius of 2.1 Å, the principal quantum number 'n' of the state of the atom is

A satellite is revolving around the Earth in a closed orbit. The height of the satellite above Earth's surface at perigee and apogee are 2500 km and 4500 km, respectively. Consider the radius of the Earth to be 6500 km. The eccentricity of the satellite's orbit is ________ (Round off to 1 decimal place).

Potential energy as a function of \(r\) is given by \( U = \frac{A}{r^{10}} - \frac{B}{r^5} \), where \(r\) is the interatomic distance, \(A\) and \(B\) are positive constants. The equilibrium distance between the two atoms will be:

A square aluminium (shear modulus is 25 × 10⁹ Nm^–2) slab of side 60 cm and thickness 15 cm is subjected to a shearing force (on its narrow face) of 18.0 × 10⁴ N. The lower edge is riveted to the floor. The displacement of the upper edge is ______μm.

A projectile is projected with the velocity of \( 3\hat{i} + 4\hat{j} \, {m/s} \). The horizontal range of the projectile will be:

For an insulator, the forbidden energy gap is:

Four holes of radius \(5\) cm are cut from a thin square plate of \(20\) cm side and mass \(1\) kg. The moment of inertia of the remaining portion about the \(Z\)-axis is:

Which one of the following graphs represents the variation of electric potential with distance \( r \) from the center of a non-conducting charged sphere of radius \( R \)?

In the circuit shown in the figure, the AC source gives a voltage \( V = 20\cos(2000t) \). Neglecting source resistance, the voltmeter and ammeter readings will be:

A capillary tube is attached horizontally to a constant heat arrangement. If the radius of the capillary tube is increased by 25 \% , then the rate of flow of liquid will change nearly by:

An electric current \( I \) enters and leaves a uniform circular wire of radius \( r \) through diametrically opposite points. A charged particle \( q \) moves along the axis of the circular wire and passes through its center at speed \( v \). The magnetic force on the particle when it passes through the center has a magnitude of:

In the following circuit, the equivalent resistance between X and Y is ...... \( \Omega \):

An achromatic convergent doublet of two lenses in contact has a power of +5D. The power of the converging lens is +6D. The ratio of the dispersive power of the converging and divergent lenses is:

An electromagnetic wave is propagating along the X-axis. At \( x = 1 \, {cm} \) and \( t = 18 \, {s} \), its electric vector \( |E| = 8 \, {V/m} \). Then the magnitude of its magnetic vector is:

A monoatomic gas of molar mass \( m \) is kept in an insulated container. The container is moving with velocity \( v \). If the container is suddenly stopped, then the change in the temperature of the gas is: