Chapter Exam

Chapter 11: Electricity — Online MCQ Test

Q: The SI unit of electric current is:

Answer: A. ampere — Electric current is the rate of flow of charge. Its SI unit is ampere (A).

Q: Electric current in a conductor is defined as the:

Answer: B. charge flowing per unit time — Electric current is given by I = Q/t, where Q is charge and t is time.

Q: A charge of 120 C flows through a wire in 60 s. What is the current in the wire?

Answer: C. 2 A — Using I = Q/t, current = 120/60 = 2 A.

Q: A 4 Ω resistor and a 6 Ω resistor are connected in series across a 20 V battery. The potential difference across the 6 Ω resistor is:

Answer: C. 12 V — Total resistance = 10 Ω, so current = 20/10 = 2 A. Voltage across 6 Ω resistor = IR = 2 × 6 = 12 V.

Q: Three resistors of 2 Ω, 3 Ω and 6 Ω are connected in parallel across a 6 V battery. The total power supplied by the battery is:

Answer: D. 36 W — For parallel combination, 1/R = 1/2 + 1/3 + 1/6 = 1, so R = 1 Ω. Power = V²/R = 36/1 = 36 W.

SCIENCE · CLASS 10 · Andhra State Board

Practice Chapter 11: Electricity with a free chapter-wise online MCQ test for Andhra State Board CLASS 10 SCIENCE. This chapter covers: Electric charge Electric current Potential difference Voltage Resistance Ohms law Resistivity Series circuit Parallel circuit Electric power Heating effect. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 11: Electricity — Important Questions & Answers (FAQ)

Frequently asked questions from Andhra State Board CLASS 10 SCIENCE — Chapter 11: Electricity, with answers and explanations. These are sample questions; the exam has its own separate question set.

The SI unit of electric current is:

A. ampere ✓
B. volt
C. ohm
D. coulomb

Answer: A. ampere
Electric current is the rate of flow of charge. Its SI unit is ampere (A).

Electric current in a conductor is defined as the:

A. work done per unit charge
B. charge flowing per unit time ✓
C. resistance per unit length
D. heat produced per unit resistance

Answer: B. charge flowing per unit time
Electric current is given by I = Q/t, where Q is charge and t is time.

A charge of 120 C flows through a wire in 60 s. What is the current in the wire?

A. 0.5 A
B. 1 A
C. 2 A ✓
D. 4 A

Answer: C. 2 A
Using I = Q/t, current = 120/60 = 2 A.

A 4 Ω resistor and a 6 Ω resistor are connected in series across a 20 V battery. The potential difference across the 6 Ω resistor is:

A. 6 V
B. 8 V
C. 12 V ✓
D. 20 V

Answer: C. 12 V
Total resistance = 10 Ω, so current = 20/10 = 2 A. Voltage across 6 Ω resistor = IR = 2 × 6 = 12 V.

Three resistors of 2 Ω, 3 Ω and 6 Ω are connected in parallel across a 6 V battery. The total power supplied by the battery is:

A. 6 W
B. 12 W
C. 24 W
D. 36 W ✓

Answer: D. 36 W
For parallel combination, 1/R = 1/2 + 1/3 + 1/6 = 1, so R = 1 Ω. Power = V²/R = 36/1 = 36 W.

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