List of top Physics Questions asked in JKCET

The work done in bringing at a unit positive charge from infinity distance to a point at distance $x$ from a positive charge $Q$ is $W$. Then the potential $ \phi $ at that point is

The latent heat of fusion of ice at $0^{\circ} C$ is $80\, cal / g$. Entropy change $(\Delta S)$ accompanying the melting of $1\, g$ of ice at $0^{\circ} C$ would be (units: $cal / g / K$ )

The frequency of the fundamental note in a wire stretched under tension $T$ is $f$. If the tension is increased to $25 \,T$, then the frequency of the fundamental note will be

When a $p-n$ junction diode is connected in forward bias its barrier potential

Kirchhoff's second law for the analysis of circuit is based on

Wien 's displacement law for emission of radiation can be written as $(\lambda_{max}$ = wavelength whose energy density is greatest)

A body moving along a circular path of radius $R$ with velocity $v$, has centripetal acceleration a. If its velocity is made equal to $2v$, then its centripetal acceleration is

The capacitance $C$ of a capacitor is

The dipole moment of a dipole in an uniform external field $ \vec{E} $ is $ \vec{P} $ . Then, the torque $ (\tau ) $ acting on the dipole is

The depletion layer in a silicon diode is $ 1\,\mu m $ wide and its knee potential is $0.6\,V$, then the electric field in the depletion layer will be

An intrinsic semiconductor at $0\,K$ temperature behaves like

The moment of inertia of a circular ring of mass $1\,kg $ about an axis passing through its centre and perpendicular to its plane is $4\, kg-m^{2}$ . The diameter of the ring is

If $g$ is the acceleration due to gravity on the surface of earth, its value at a height equal to double the radius of earth is

The de-Broglie wavelength associated with a particle moving with momentum $(p)$ and mass $(m)$ is

Colours in thin films are due to

Two vectors are given by $\vec{A}=3 \hat{i}+\hat{j}+3 \hat{k}$ and $\vec{B}=3 \hat{i}+5 \hat{j}-2 \hat{k}$. Find the third vector $\vec{C}$, if $\vec{A}+3 \vec{B}-\vec{C}=\vec{0}$.

The motion of the centre of mass is the result of

From the top of a tower a body $A$ is projected vertically up, another body $B$ is horizontally thrown and a third body $C$ is thrown vertically down with same velocity. Then

The only mechanical quantity which has negative dimension of mass is

Electric potential at the centre of a charged hollow metal sphere is

A particle executes SHM with a period of $ 8\,s $ and amplitude $ 4\,cm $ . Its maximum speed in $cm/s$, is

A long magnet is cut into two equal parts, such that the length of each half is same as that of original magnet. If the period of original magnet is $T$, the period of new magnet is

The coordinates of a moving particle at any time $t$ are given by $x=\alpha t^{3}$ and $y=\beta t^{3}$. The speed of the particle at time $t$ is given by

In breakdown region, a Zener diode behaves as a

Two unlike charges of the same magnitude $Q$ are placed at a distance $d$. The intensity of the electric field at the middle point in the line joining the two charges