List of top Physics Questions

A musician hits a drum 90 times in a minute. The time period of hit is

If the speed of the transverse wave in a wire under certain tension T is v, then its speed under tension $2T$ (in $ms^{-1}$) is

If the mean free path of a gas molecule at $27^{\circ}\text{C}$ is $10\times10^{-7}\ \text{m}$, its mean free path at $87^{\circ}\text{C}$ is:

The number of molecules contained in the gas of mass M is ($M_o$ - molar mass, $N_A$ - Avogadro's number)

Which one is INCORRECT statement?

Bernoulli's principle is applicable to

The principle behind the function of Bunsen burner is

$P_a$ is atmospheric pressure and P is absolute pressure at depth h. The gauge pressure at depth h is:

The orbital velocity $v_o$ of a satellite at height R from the surface in terms of escape velocity $v_e$ from the earth is:

Two satellites A and B are orbiting the earth at heights of 2.5R and 7.5R from the centre. The ratio of their time periods is:

If the angular displacement made by a rotating wheel in 10 s is $150\pi$ radian, then the number of revolutions made by it is:

If a torque of 1.25 Nm acts on a circular ring for 4 s, then its angular momentum changes by ($kgm^2s^{-1}$):

The moment of inertia and rotational kinetic energy of a rigid body are 4 $kgm^2$ and 50 J respectively. The angular velocity of the body (in rad $s^{-1}$) is:

A particle moving in a horizontal circle of radius 0.5 m completes half rotation. The work done by the centripetal force of 5 N on the particle (in J) is:

Two bodies having masses in the ratio 1:3 have equal linear momentum. Their respective kinetic energies are in the ratio:

The force to be applied to a body of mass $200\ \text{g}$ to change its velocity by $25\ \text{m s}^{-1}$ in $5\ \text{s}$ is:

A block of mass $m$ is suspended from the ceiling of a lift by an inextensible string. When the lift moves upward with an acceleration of $0.2\ \text{m s}^{-2}$, the tension is $80\ \text{N}$. Then the mass of the block is:

A ball moves in a circle of radius $0.5\ \text{m}$ from A to B (quarter circle) in $\sqrt{2}\ \text{s}$. The average velocity is:

A cricketer hits a ball at $45^{\circ}$ with velocity $40\ \text{m s}^{-1}$ and it falls at $160\ \text{m}$. If he hits at the same angle with $50\ \text{m s}^{-1}$, the distance will be:

A particle moving with an initial velocity of $1\ \text{m s}^{-1}$ has a uniform acceleration of $2\ \text{m s}^{-2}$. The distances travelled by the particle in the first two intervals of $5\ \text{s}$ are respectively:

The dimension of $X$ in the equation $F=6\pi\eta X$ is: (F - Force; $\eta$ - Coefficient of viscosity)

The reverse biasing in a junction diode,

An alternating voltage of \( 250\,\text{V},\,50\,\text{Hz} \) is applied to a full wave rectifier. If the internal resistance of each diode is \( 10\,\Omega \) and the load resistance is \( 5\,\text{k}\Omega \), the peak value of output current is

The greatest wavelength of the radiation that will ionize unexcited hydrogen atom is

The half-life periods of two radioactive materials A and B are 1500 years and 1200 years respectively. If their mean life periods are \( \tau_A \) and \( \tau_B \) respectively, then the value of the ratio \( \frac{\tau_A}{\tau_B} \) is