ICSE Class 10 Alternating Current — Mock Test (2027)
Free online mock test for Alternating Current (ICSE Class 10 Physics) — 81 competency-based questions based on the latest CISCE 2027 syllabus, with instant marking. Try the samples below, then take the full test free.
What to expect: This mock test covers key concepts from the Alternating Current chapter — including application-based and competency-focused questions aligned with how ICSE actually sets the paper.
Tip: Attempt without notes first to identify gaps, then review explanations for any wrong answers. Retake after a few days for best retention.
Sample questions
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1.For transporting electric power, a low power factor implies large power loss in transmission because:
- A.A larger current is required to supply a given power, increasing I squared R loss
- B.The voltage must be reduced
- C.The resistance of the line increases
- D.The frequency of the supply falls
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2.The impedance Z of a series LCR circuit is given by:
- A.Z = sqrt(R squared + (XC - XL) squared)
- B.Z = R + XC + XL
- C.Z = sqrt(R squared - (XC - XL) squared)
- D.Z = R squared + (XC - XL) squared
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3.Assertion (A): A capacitor allows alternating current to flow through a circuit but blocks steady direct current. Reason (R): The capacitive reactance 1/(omega C) is finite for ac but effectively infinite for dc (omega = 0).
- A.Both A and R are true and R is the correct explanation of A
- B.Both A and R are true but R is NOT the correct explanation of A
- C.A is true but R is false
- D.A is false but R is true
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4.![resonance_curve_lcr.png]() Comparing the two curves in the figure, curve (i) for R = 100 ohm is taller and narrower while curve (ii) for R = 200 ohm is shorter and broader, though both peak at w0. This shows that as the resistance R is decreased, the resonance becomes:
- A.Sharper, giving a higher quality factor Q
- B.Broader, giving a lower quality factor Q
- C.Sharper, but the quality factor Q is unchanged
- D.Shifted to a higher value of w0
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5.In a series circuit a resistor of 200 ohm is in series with a capacitor whose reactance is 212 ohm, connected to a 220 V ac source. The impedance of the circuit is approximately:
- A.412 ohm
- B.291 ohm
- C.206 ohm
- D.150 ohm
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