List of top Physics Questions asked in JKCET

The mobility of free electrons (charge = $e$, mass = $m$ and relaxation time = $ \tau $ .) in a metal is proportional to
If the radius of a nucleus of mass number $3$ is $R$ ,then the radius of a nucleus of mass number $81$ is
A Carnot cycle has the reversible processes in the following order
Two springs of spring constants $k_{1}$ and $k_{2}$ are joined in series and a mass $m$ is attached to them as shown in figure. The time-period of oscillations of the springs is
A can filed with water is revolved in a vertical circle of radius 4 m and the water does not fall down. The time period for a revolution is about
The crystal structure can be studied by using
Which one of the following is not associated with the total internal reflection?
The following figure represents
Magnitudes of four pairs of displacement vectors are given. Which pair of displacement vectors, under vector addition, fails to give a resultant vector of magnitude $ 3\,cm $ ?
Assuming earth to be an inertial frame, an example for inertial frame observer is
Which of the following cannot be speed-time graph ?
Heater coil $A$ takes $t_1 $ second to boil certain quantity of water. Heater coil $B$ takes $t_2 $ second to boil same quantity of water. If $A$ and $B$ are connected in series, the time taken to boil the same quantity of water by the combination is
The resistance of an ideal voltmeter is
When a wave undergoes refraction
A cricket ball of mass $0.5\, kg$ strikes a cricket bat normally with a velocity of $20\, ms ^{-1}$ and rebounds with velocity of $10\, ms ^{-1}$. The impulse of the force exerted by the ball on the bat is
The velocity of an electromagnetic wave in vacuum can be changed by changing
In a moving coil galvanometer, to make the field radial
Electric flux emanating through a surface element $ \overrightarrow{ds}=5\hat{i} $ placed in an electric field $ \vec{E}=4\hat{i}+4\hat{j}+4\hat{k} $ is
A particle is executing linear simple harmonic motion. The fraction of the total energy that is potential, when its displacement is $ \frac{1}{4} $ of the amplitude is
Energy stored per unit volume of a parallel plate capacitor having plate area $A$ and plate separation d when charged to a potential of $V$ volts is (air space in between the plates)
The working principle of rocket propulsion is conservation of
The relation connecting magnetic susceptibility $ \chi_{m} $ and relative permeability $ \mu _{r} $ is
The nuclear force
The average power dissipated in a pure capacitance $AC$ circuit is
In a transistor, the base is