List of top Physics Questions asked in JKCET

A body of mass $ 5 \,kg $ acquires an angular acceleration of $ 10\, rad\, s^{-2} $ by an applied torque of $ 2 \,N m $ . Find its radius of gyration.

The motion of a particle is represented by the equation $ S = 8t^3 - 2t^2+ 6t + 7 $ . Find the velocity of the particle at the end of $ 2 $ seconds in $ m s^{-1} $

In a Young?s double slit experiment, the two slits which are separated by $ 1.2\, mm $ are illuminated with a monochromatic light of wavelength $ 6000 $ angstorm. The interference pattern is observed on a screen placed at a distance of $ 1m $ from the slits. Find the number of bright fringes formed over $ 1 \,cm $ width on the screen.

A particle moves with a uniform speed $ v $ and time period $ T $ in a circular path of radius $ r $ . If the speed of the particle is doubled, its new time period is

In a moving coil galvanometer, the coil having $ 500 $ turns and an average area of $ 4 \,cm^{2} $ carries a current of $ 0.1 \,A $ and is set parallel to a magnetic field with a torque of $ 0.15\, N \,m $ . The strength of the magnetic field is

The kinetic energy of a particle executing simple harmonic motion is $ 1/6^{th} $ of its maximum value at a distance of $ 5 \,cm $ from its equilibrium position. The amplitude of its motion is

An organ pipe open at both ends has fundamental frequency $ f $ in air. If the pipe is dipped vertically in water such that $ 1/4^{th} $ of its length is inside water, then the fundamental frequency of the air column in it is

The operating point of transistor amplifier should be in

For a thin lens with radii of curvatures and $ R_{1} $ and $ R_{2} $ , refractive index $ n $ and focal length $ f $ , the factor $ \left(\frac{1}{R_{1}}-\frac{1}{R_{2}}\right) $ is equal to

The electric flux passing through $a$ cube of side $ a $ , which holds a charge $ q $ at one of its corners is

The angle between the linear momentum and angular momentum of a particle moving along a circle is

The distance of closest approach for an alpha nucleus of velocity $ v $ bombarding a stationary heavy nucleus target of charge $ Ze $ is directly proportional to

Identify the correct statement about a stationary wave

If the coefficient of linear expansion of a metal is $ 0.00002 \,K^{-1} $ , then the necessary increase in temperature of the metal rod in order to increase its length by $ 2\% $ is

For an ideal step-down transformer, the quantity which is constant for both the coils is

If the ratio of the mechanical energy of a mass whose oscillations are damped to that of its free oscillations is $ e^{-3 t/m} $ , then the ratio of the amplitudes of the damped oscillations to that of free oscillations is

The processes $ 3, 2 $ and $ 1 $ represent the respective isobaric, isothermal and adiabatic expansion of one mole of a gas initially at a pressure $ P $ from volume $ V $ to $ 2V $ . The work done is

The temperature of source of a Carnot engine of efficiency $ 20\% $ when the heat exhausted is at $ 240 \,K $ is

For an object placed in front of a convex mirror of focal length $ f $ , its image is formed

A metallic wire of cross sectional area $ 4 \, mm^{2} $ carries a current of $ 3.2 \, A $ . If $ 5 \times 10^{26} $ charge carriers flow across the wire per unit volume, then their drift velocity in $ m \,s^{-1} $ is

In a potentiometer, auniform potential gradient of $ 0.8 \,V \,m^{-1} $ is maintained across its $ 10 \,m $ wire. The potential difference across two points on the wire located at $ 0 \,m \,65\, cm $ and $ 2 \,m\, 45 \,cm $ is

The correct statement about electric dipole is

A ball is projected up at an angle $\theta$ with horizontal from the top of a tower with speed $v$. It hits the ground at point $A$ after time $t_{A}$ with speed $v_{A}$ . Now, this ball is projected at same angle and speed from the base of the tower (located at point $P$) and it hits ground at point $B$ after time $t_{B}$ with speed $v_{B}$. Then

A person is standing on a weighing-scale and observes that the reading is $60\,kg$ . He then suddenly jumps up and observes that reading goes to $70\,kg$ . Then his maximum upward acceleration is

A solid sphere is rolling down an inclined plane. Then, the ratio of its translational kinetic energy to its rotational kinetic energy is