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 ……