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Class 12 Physics — Chapter 7: Alternating Current
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Free NCERT-aligned multiple-choice practice for Class 12 Physics, Chapter 7 (Alternating Current). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 90.
Sample questions
Q1Easy
Vrms = Vpeak ÷
A.√2✓ correct
B.2
C.π
D.3
Why
Vrms = V₀/√2.
Q2Medium
Impedance of pure inductor:
A.ωL✓ correct
B.1/(ωC)
C.R
D.L/ω
Why
X_L = ωL.
Q3Hard
Average power in AC: P =
A.V_rms · I_rms · cosφ✓ correct
B.V_peak · I_peak
C.V·I
D.V²/R
Why
cosφ = power factor.
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