Beta Question Bank for Medical: Physics>Chapter 27 - Electromagnetic Induction>BEGINNER'S BOX - 4>Q 5

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For a coil having $L = 2 mH$ , current flow through it is, $I = t^{2} e^{- t}$ . Then, the time at which emf becomes zero is,

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Important Questions on Electromagnetic Induction

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Beta Question Bank for Medical: Physics>Chapter 27 - Electromagnetic Induction>BEGINNER'S BOX - 4>Q 6

Current through a coil varies according to graph. Then, induced emf v/s time graph is,

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Beta Question Bank for Medical: Physics>Chapter 27 - Electromagnetic Induction>BEGINNER'S BOX - 4>Q 7

A solenoid has a self inductance of

2 H

. If the length of the solenoid is doubled having turn density and area constant, then new self inductance is,

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Beta Question Bank for Medical: Physics>Chapter 27 - Electromagnetic Induction>BEGINNER'S BOX - 4>Q 8

A solenoid is wound over a rectangular frame. If all the linear dimensions of the frame are increased by a factor

3

and the number of turns per unit length remains the same, the self inductance increased by a factor of,

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Beta Question Bank for Medical: Physics>Chapter 27 - Electromagnetic Induction>BEGINNER'S BOX - 4>Q 9

A coil has inductance of

2 H

has a current of

5.8 A

. The flux, in weber, through the coil is,

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Beta Question Bank for Medical: Physics>Chapter 27 - Electromagnetic Induction>BEGINNER'S BOX - 5>Q 2

A coil of

10 H

inductance and

5 Ω

resistance is connected to

5 V

battery in series. The current in ampere in circuit

2 s

after switch is put on is,

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Beta Question Bank for Medical: Physics>Chapter 27 - Electromagnetic Induction>BEGINNER'S BOX - 5>Q 3

An

L - R

circuit consists of an inductance of

8 mH

and a resistance of

4 Ω

. The time constant of the circuit is,

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Beta Question Bank for Medical: Physics>Chapter 27 - Electromagnetic Induction>BEGINNER'S BOX - 5>Q 4

In an

L - R

circuit, time constant is that time in which current grows from zero to the value... (where,

I_{0}

is steady-state current).

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Beta Question Bank for Medical: Physics>Chapter 27 - Electromagnetic Induction>BEGINNER'S BOX - 5>Q 5

An inductor of

20 H

and a resistance of

10 Ω

are connected to a battery of

5 V

in series. Then, the initial rate of change of current is,