Electromagnetic Induction

Faraday, Lenz, and mutual induction basics. Ideal for students preparing board exams and competitive tests.

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QUESTION NO 01

Two resistors in series have equivalent resistance?

Answer: Sum of individual resistances

R_eq = R₁ + R₂ for series connection.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 02

Drift velocity of electrons in a conductor is typically?

Answer: Very small (mm/s order)

Drift speeds are usually millimetres per second; signal propagation is much faster.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 03

Dielectric constant of vacuum is?

Answer: 1

Relative permittivity of free space κ = 1.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 04

A transformer works on the principle of?

Answer: Mutual induction

Transformers use mutual electromagnetic induction between coils.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 05

Kirchhoff's loop rule is based on conservation of?

Answer: Energy

ΣΔV = 0 around a closed loop — energy conservation.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 06

Kirchhoff's junction rule is based on conservation of?

Answer: Charge

ΣI = 0 at a junction — charge conservation.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 07

Power dissipated in a resistor is?

Answer: I²R

P = I²R = V²/R = VI.

Shahzad Mahota @shahzad-mahota

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QUESTION NO 08

SI unit of magnetic field (B) is?

Answer: Tesla

SI unit of B is the tesla (T); 1 T = 1 Wb/m².

Shahzad Mahota @shahzad-mahota

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QUESTION NO 09

Lenz's law says induced current?

Answer: Opposes the change causing it

Induced effects oppose the change in flux (energy conservation).

Shahzad Mahota @shahzad-mahota

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QUESTION NO 10

Faraday's law relates induced emf to?

Answer: Rate of change of magnetic flux

ε = −dΦ_B/dt.

Shahzad Mahota @shahzad-mahota

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Electromagnetic Induction

Two resistors in series have equivalent resistance?

Drift velocity of electrons in a conductor is typically?

Dielectric constant of vacuum is?

A transformer works on the principle of?

Kirchhoff's loop rule is based on conservation of?

Kirchhoff's junction rule is based on conservation of?

Power dissipated in a resistor is?

SI unit of magnetic field (B) is?

Lenz's law says induced current?

Faraday's law relates induced emf to?

Published By

Shahzad Mahota

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00

00

00

00

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Electromagnetic Induction

Two resistors in series have equivalent resistance?

Explanation

Drift velocity of electrons in a conductor is typically?

Explanation

Dielectric constant of vacuum is?

Explanation

A transformer works on the principle of?

Explanation

Kirchhoff's loop rule is based on conservation of?

Explanation

Kirchhoff's junction rule is based on conservation of?

Explanation

Power dissipated in a resistor is?

Explanation

SI unit of magnetic field (B) is?

Explanation

Lenz's law says induced current?

Explanation

Faraday's law relates induced emf to?

Explanation

Published By

Shahzad Mahota

00

00

00

00

00

00

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