EASY
JEE Main
IMPORTANT
Earn 100
A capacitor of capacitance is charged completely using a DC supply of . It is now connected to an inductor of inductance to form an LC circuit. The maximum current in LC circuit will be _____ .
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Important Questions on Electromagnetic Induction and Alternating Currents
MEDIUM
JEE Main
IMPORTANT
A conducting loop of radius is placed perpendicular to a uniform magnetic field of . The magnetic field is decreased to zero in at a steady rate. The induced emf in the circular loop at is:
MEDIUM
JEE Main
IMPORTANT
In the circuit shown in the figure, the ratio of the quality factor and the band width is _____ .
MEDIUM
JEE Main
IMPORTANT
A metallic rod of length is rotated with an angular speed of normal to a uniform magnetic field about an axis passing through one end of rod as shown in figure. The induced emf will be :
.
EASY
JEE Main
IMPORTANT
Three identical resistors with resistance and two identical inductors with sell inductance are connected to an ideal battery with emf of as shown in figure. The current through the battery long after the switch has been closed will be________.
EASY
JEE Main
IMPORTANT
In an LC oscillator, if values of inductance and capacitance become twice and eight times, respectively, then the resonant frequency of oscillator becomes times its initial resonant frequency . The value of is:
EASY
JEE Main
IMPORTANT
An LCR series circuit of capacitance and resistance of , is connected to an A.C. source of frequency . For maximum value of amplitude of current in circuit, the value of inductance is ____.
EASY
JEE Main
IMPORTANT
A wire of length moving with velocity at right angles to a magnetic field of . The magnitude of induced emf, between the ends of wire will be ___________.
EASY
JEE Main
IMPORTANT
A series LCR circuit is connected to an AC source of , . The circuit contains a resistance , an inductor of inductive reactance , and a capacitor of capacitive reactance . The power factor of circuit is . The value of is:
