Capacitance & Dielectrics

Parallel-plate capacitors and dielectric effects. Ideal for students preparing board exams and competitive tests.

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Capacitance & Dielectrics
QUESTION NO 01
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 02
Kirchhoff's junction rule is based on conservation of?

Answer: Charge
ΣI = 0 at a junction — charge conservation.
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
52 Quizzes
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QUESTION NO 03
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 04
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 05
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 @shahzad-mahota
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QUESTION NO 06
Faraday's law relates induced emf to?

Answer: Rate of change of magnetic flux
ε = −dΦ_B/dt.
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
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QUESTION NO 07
Magnetic field lines?

Answer: Form closed loops
B-field lines are continuous closed loops (no magnetic monopoles).
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
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QUESTION NO 08
SI unit of capacitance is?

Answer: Farad
Capacitance is measured in farads (F).
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
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QUESTION NO 09
Capacitance of a parallel-plate capacitor increases if?

Answer: Plate area increases
C = ε₀A/d (or κε₀A/d); larger A or smaller d increases C.
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
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QUESTION NO 10
Coulomb's law gives force between?

Answer: Two point charges
F = k|q₁q₂|/r² between two point charges.
Shahzad Mahota
Shahzad Mahota @shahzad-mahota
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Shahzad Mahota

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