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Circuit Laws Practice

Series/parallel resistors and Kirchhoff rules. Ideal for students preparing board exams and competitive tests.

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Circuit Laws Practice
QUESTION NO 01
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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 @shahzad-mahota
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QUESTION NO 02
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Power dissipated in a resistor is?

Answer: I²R
P = I²R = V²/R = VI.
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
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QUESTION NO 03
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Kirchhoff's junction rule is based on conservation of?

Answer: Charge
ΣI = 0 at a junction — charge conservation.
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
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QUESTION NO 04
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Kirchhoff's loop rule is based on conservation of?

Answer: Energy
ΣΔV = 0 around a closed loop — energy conservation.
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
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QUESTION NO 05
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A transformer works on the principle of?

Answer: Mutual induction
Transformers use mutual electromagnetic induction between coils.
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
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QUESTION NO 06
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Dielectric constant of vacuum is?

Answer: 1
Relative permittivity of free space κ = 1.
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
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QUESTION NO 07
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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 @shahzad-mahota
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QUESTION NO 08
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Two resistors in series have equivalent resistance?

Answer: Sum of individual resistances
R_eq = R₁ + R₂ for series connection.
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
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QUESTION NO 09
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Two equal resistors R in parallel give?

Answer: R/2
For two equal R in parallel, R_eq = R/2.
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
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QUESTION NO 10
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Lorentz force on a charge q moving with velocity v in field B is?

Answer: q(v × B)
Magnetic force F = q(v × B) (plus qE if electric field present).
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
302 Quizzes
2930 Questions
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Shahzad Mahota

@shahzad-mahota

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