List of top Physics Questions asked in GUJCET

If the primary coil of a transformer has 100 turns and the secondary has 200 turns, then for an input of 220 V at 10 A, find the output current in the step-up transformer. 

In Young's double-slit experiment, the slits are separated by 0.28 mm, and the screen is placed 1.4 m away. The distance between the central bright fringe and the fourth bright fringe is measured to be 12 cm. Then, the wavelength of light used in the experiment is …….

Js is the unit of …….. physical quantity.

The refractive index of glass is 1.6 and the speed of light in glass will be ……… . The speed of light in vacuum is \( 3.0 \times 10^8 \) ms\(^{-1}\).

Consider a refracting telescope whose objective has a focal length of 1m and the eyepiece a focal length of 1cm, then the magnifying power of this telescope will be …….. 

To emit an electron from the metal, the minimum electric field required is ….. 

The phase difference between any two particles in a given wavefront is …..

Cellular phones use radio waves to transmit voice communication in the ……

For a thin prism, if the angle of the prism is \( A \) with a refractive index of 1.6, then the angle of minimum deviation will be …….

A ray coming from an object which is situated at zero distance in the air and falls on a spherical glass surface (\( n = 1.5 \)). Then the distance of the image will be ……….  \( R \) is the radius of curvature of a spherical glass.} 

For a plane mirror, the focal length is ……..

A parallel plate capacitor with air between the plates has a capacitance of 4 pF. If the distance between the plates is reduced by half and the space between them is filled with a substance of dielectric constant 6, then the value of capacitance will be ……..

As indicated below, which one is the equation of Ampere-Maxwell law?

For obtaining wattless current,…….  is connected with AC supply.}

In an LCR series AC circuit at resonance, the value of power factor will be …….

An inductor of 50.0 mH is connected to a source of 220 V. Then the rms current in the circuit will be ……. . The frequency of the source is 50 Hz.  

A coil has \( N \) turns and current passes through it as \( I \) ampere, then we obtain \( L \) Henry of self-inductance. Now if the current changes to 5I, then the new self-inductance will be 

The SI unit of the current density is 

A short bar magnet placed with its axis at \( 30^\circ \) and a uniform external magnetic field of 0.5 T experiences a torque of magnitude equal to \( 4.5 \times 10^{-2} \) J. Then the magnitude of the magnetic moment of the magnet will be 

An ideal ammeter and an ideal voltmeter have resistances of  ………… \(\Omega\) and ……

A silver wire has a resistance of 215 \(\Omega\) at 27.5°C and a resistance of 270 \(\Omega\) at 100°C. Then the temperature coefficient of the resistivity of silver will be ……

Vs/Am is the unit of which physical quantity? 

Calculate the current in the circuit using Ohm's Law. Given that the voltage across the resistor is V=10 V and the resistance is R = 4 

A square loop of side 10 cm and resistance 0.5 \(\Omega\) is placed vertically in the east-west plane. A uniform magnetic field of 0.10 T is set across the plane in the northeast direction. The magnetic field decreases to zero at 0.70 s at a steady rate. Then the magnitude of the induced current during this time interval will be