Electromagnetic Induction And AC Mock Tests

The self-inductance of a long solenoid with n turns per unit length, area of cross-section A and length l is:

A transformer has 100 turns in the primary and 2000 turns in the secondary. If the primary is connected to 220 V AC, the secondary voltage is:

A LCR series circuit has L = 0.5 H, C = 20 μF, and R = 100 Ω. The resonant frequency is:

In a series LCR circuit at resonance, the impedance is:

The self-inductance of a solenoid is proportional to:

A coil of 200 turns and area 0.02 m² is placed perpendicular to a magnetic field of 0.4 T. The field is reduced to zero in 0.1 s. The induced emf is:

In an LCR series circuit, the resonant frequency is 100 Hz. If both the inductance and capacitance are doubled, the new resonant frequency will be:

A coil of 100 turns and area 0.01 m² is placed perpendicular to a magnetic field of 0.1 T. The magnetic flux linked with the coil is: