List of top Questions asked in Bihar Board Class XII

Three capacitors of capacitance 6 µF are available. The minimum and maximum capacitances obtained are
The root mean square (r.m.s) value of alternating current equation I = 60 sin 100 πt is
The impedance of L-R circuit is
The radius of a circular current loop is made double and the current is made half. The magnetic moment of the loop will become
The self-inductance of a choke coil is 5 henry. The current through it is increasing at a rate of 2 AS\(^{-1}\). The self-induced emf in the choke coil will be
Magnetic moment of the earth is
Nickel is
The angle between magnetic meridian and geographical meridian is called
The radius of curvature of each surface of a biconvex lens is 20 cm and the refractive index of the material of the lens is 1.5. The focal length of the lens is
Which physical quantity will be the same for an electron and a photon of the same wavelength?
The function of moderator in nuclear reactor is to
The impurity element used for p-type semiconductor is
Diode is used as
The net charge on a charged capacitor is
The motion of an electron inside a conductor is
The total electric flux coming out from stationary unit positive charge in air is
The force, acting on per unit charge is called
Quantisation of charge indicates that
Electric field lines provide information about
The width of diffraction fringes is .......... to the width of interference fringes.
Light year is equal to
If any ammeter is shunted, then the total resistance of the circuit
The temperature coefficient of a semi-conductor is
If T is time period and V is maximum speed of a charged particle in cyclotron, then
Van de Graaff generator is an electrostatic machine which produces