Electromagnetic Induction And AC Mock Tests

In an AC circuit containing a resistor and an inductor in series, the voltage across the resistor is 30 V and across the inductor is 40 V. The RMS supply voltage 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 coil of 100 turns has an area of 0.01 m². A magnetic field of 0.5 T perpendicular to the coil is increased to 1.5 T 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:

The self-inductance of a solenoid is 50 mH. If the number of turns is doubled keeping the length and area constant, the new self-inductance will be:

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:

The self-inductance of a solenoid is proportional to:

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: