List of top Physics Questions asked in JKCET

When longitudinal wave propagates, what happens in the region of compressions and rarefactions?

A stone of mass $0.05 \,kg$ is thrown vertically upwards. What is the direction and magnitude of net force on the stone during its upward motion ?

When the gas expands with temperature using the relation $V=KT^{2/3}$ for the temperature change of $40\,K,$ the work done is

Which quantity is transmitted with propagation of longitudinal waves through a medium?

Mass number of an atom is the sum of

Which of the following relation is called mirror equation?

For transistor the value of $\beta$ is $50$ then, the value of $\alpha$ is

A car moving on a straight road covers $1/3$ of the distance with $25\,km/h$ and rest with $75\,km/h$ . The average speed is

Light from a point source in air falls on a spherical glass surface ( $n=1.67$ and radius of curvature $=25\,cm$ ). The distance of the light source from the glass surface is $95\,cm$ . At what position, the image is formed?

A $15\,pF$ capacitor is connected to a $60\,V$ battery. How much electrostatic energy is stored?

A $400\,pF$ capacitor is charged by a $100\,V$ supply. How much electrostatic energy is lost in the process of disconnecting from the supply and connecting another uncharged $400\,pF$ capacitor?

A concave mirror of focal length $f$ produces a real image $n$ times the size of the object. The distance of the object from the mirror is

A compound microscope has a magnification of $30$ . The focal length of the eye-piece is $5\,cm$ If the final image is formed at the least distance of distinct vision $(25\,\,cm)$ the magnification produced by the objective is

A straight wire of mass $300 \,g$ and length $2.5\,m$ carries a current of $3.5\,A$ . It is suspended in mid-air by a uniform horizontal magnetic field $B$. What is the magnitude of the magnetic field?

The bus moving with a speed of $42 \,km / h$ is brought to a stop by brakes after $6\, m$. If the same bus is moving at a speed of $90 \,km / h$, then the minimum stopping distance is

A solenoid of length $0.6 \,m$ has a radius of $1 \,cm$ and is made up of $600$ turns. It carries a current of $6 \,A$. What is the magnitude of the magnetic field inside the solenoid?

The Lenz's law is the consequence of the conservation of

The waves used for line-of-sight $(LOS)$ communication is

The motion of a particle in straight line is an example of

When an object is placed $40\,cm$ from a diverging lens, its virtual image is formed $20\,cm$ from the lens. The focal length and power of lens are

Unpolarized light falls on two polarizing sheets placed one on top of other. If the intensity of transmitted light is one fourth of the incident light, the angle between them is

The alternating current in a circuit is given by $I=50\,\sin \,314\,t$ . The peak value and frequency of the current are

Polonium has a half-life of $140$ days. If we take $20\,g$ of polonium initially then the amount of it that remains after $280$ days is

The dimensional formula of electric potential is

The transverse nature of electromagnetic waves is proved by which of the following?