A wire is in the form of a semi-circle of radius r/2. One end of wire is attached to an axis about which it rotates with an angular speed ω. The axis is normal to the plane of the semi-circle. The wire is placed in a uniform magnetic field B parallel to the axis. The induced emf between the ends of the wire will be
The deflection in a moving coil galvanometer falls from x divisions to y divisio
NextResistance of voltmeter shown in the circuit is
Which of the following is not the unit of length :
Medium-- The speed of light in a medium is 1.5 × 10⁸ m/s. The critical angle for this medium with respect
MediumThe frequency of an electromagnetic wave in free space is 2 MHz. When it passes through a medium of
Easy-- In a p-type semiconductor, the majority charge carriers are
Easy-- The energy of an electron in nth orbit of hydrogen atom is E_n = -13.6/n² eV. The energy required
Medium-- Two magnets of magnetic moments M and 2M are placed in a vibration magnetometer, with like poles
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