List of top Physics Questions asked in KCET

The work done to move a charge on an equipotential surface is

First overtone frequency of a closed pipe of length $'l_1'$ is equal to the $2^{nd}$ harmonic frequency of an open pipe of length $'l_2'$ .The ratio $\frac{l_1}{l_2} = $

Two capacitors of $3 \, \mu F$ and $6 \, \mu F$ are connected in series and a potential difference of 900 V is applied across the combination. They are then disconnected and reconnected in parallel. The potential difference across the combination is

The magnitude of point charge due to which the electric field 30 cm away has the magnitude ,$2 \, NC^{-1}$ will be

An object is placed at a distance of 20 cm from the pole of a concave mirror of focal length 10 cm. The distance of the image formed is

A step-up transformer operates on a 230 V line and a load current of 2 A. The ratio of primary and secondary windings is 1 : 25. Then the current in the primary is

A man weighing 60 kg is in a lift moving down with an acceleration of $1.8 \, ms^{-2}$. The force exerted by the floor on him is

A jet plane having a wing-span of 25 m is travelling horizontally towards east with a speed of 3600 km/hour. If the Earth?s magnetic field at the location is $4 \times 10^{-4} \, T$ and the angle of dip is $30^{\circ}$, then, the potential difference between the ends of the wing is

A cyclotron?s oscillator frequency is 10 MHz and the operating magnetic field is 0.66 T. If the radius of its dees is 60 cm, then the kinetic energy of the proton beam produced by the accelerator is

A space station is at a height equal to the radius of the Earth. If $'v_E'$ is the escape velocity on the surface of the Earth, the same on the space station is ....... times $v_E$.

The radius of the Earth is 6400 km. If the height of an antenna is 500 m, then its range is

According to Huygen's principle, during refraction of light from air to a denser medium

Two point charges $A = +3\, nC$ and $B = +1\, nC$ are placed $5\,cm$ apart in air. The work done to move charge $B$ towards $A$ by $1\,cm$ is

A galvanometer of resistance $50\, O$ is connected to a battery of $3V$ along with a resistance of $2950\, O$ in series shows full-scale deflection of $30$ divisions. The additional series resistance required to reduce the deflection to $20$ divisions is

A bar magnet is allowed to fall vertically through a copper coil placed in a horizontal plane. The magnet falls with a net acceleration

A basic communication system consists of (i) transmitter (ii) information source (III) user of information (iv) channel (v) receiver

According to Cartesian sign convention, in ray optics

In metre bridge experiment, with a standard resistance in the right gap and a resistance coil dipped in water (in a beaker) in the left gap, the balancing length obtained is $?l?$. If the temperature of water is increased, the new balancing length is

A magnetic dipole of magnetic moment $6 \times 10^{-2} \, {Am^{2}}$ and moment of inertia $12 \times 10^{-6} \, {kg\, m^{2}}$ performs oscillations in a magnetic field of $2 \times 10^{-2} $ T. The time taken by the dipole to complete $20$ oscillations is $( \pi \simeq 3)$

A motor pump lifts $6$ tonnes of water from a well of depth $25\, m$ to the first floor of height $35\, m$ from the ground floor in $20$ minutes. The power of the pump (in kW) is $[g = 10\, ms^{-2}]$

Two simple pendulums $A$ and $B$ are made to oscillate simultaneously and it is found that $A$ completes $10$ oscillations in $20\, sec$ and $B$ completes $8$ oscillations in $10\, sec$. The ratio of the lengths of $A$ and $B$ is

A proton, a deuteron and an $\alpha$ - particle are projected perpendicular to the direction of a uniform magnetic field with same kinetic energy. The ratio of the radii of the circular paths described by them is

The S.I. unit of specific heat capacity is