Current Electricity Practice Questions

NEET · Physics · 1593 free MCQs with instant results and detailed explanations.

1593

Total

382

Easy

669

Medium

542

Hard

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Topics in Current Electricity

Wheatstone Bridge 360

Meter Bridge 312

Potentiometer 303

Kirchhoff's Laws 317

Ohm's Law 301

Sample Questions from Current Electricity

Here are 10 sample questions. Start a quiz to get randomized questions with scoring.

Easy

What does Ohm's Law state?

A. V = IR

B. R = V/I

C. I = VR

D. V = IR^2

Show Answer & Explanation

Correct Answer: A

Ohm's Law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points, and inversely proportional to the resistance (R). This is mathematically expressed as V = IR.

Easy

If the resistance of a wire is doubled while keeping the voltage constant, what happens to the current?

A. It doubles

B. It halves

C. It remains the same

D. It quadruples

Show Answer & Explanation

Correct Answer: B

According to Ohm's Law, if the resistance (R) is doubled while keeping voltage (V) constant, the current (I) will halve, because I = V/R.

Easy

In a circuit with a constant voltage of 10V and a resistance of 5Ω, what is the current flowing through the circuit?

A. 2A

B. 5A

C. 10A

D. 0.5A

Show Answer & Explanation

Correct Answer: A

Using Ohm's Law, I = V/R = 10V / 5Ω = 2A.

Medium

What happens to the current through a conductor if the voltage across it is doubled while the resistance remains constant?

A. The current doubles

B. The current halves

C. The current remains the same

D. The current quadruples

Show Answer & Explanation

Correct Answer: A

According to Ohm's Law, V = IR. If voltage (V) is doubled and resistance (R) remains constant, the current (I) will also double.

Medium

A wire has a resistance of 10 ohms when it is at room temperature. What will be its resistance if the temperature increases and the temperature coefficient of the wire is 0.004/°C given a temperature increase of 50°C?

A. 12 ohms

B. 10 ohms

C. 15 ohms

D. 14 ohms

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Correct Answer: A

Resistance increases with temperature according to R = R0(1 + αΔT). Here, R0 = 10 ohms, α = 0.004, and ΔT = 50°C. Thus, R = 10(1 + 0.004 * 50) = 12 ohms.

Medium

In a circuit, a resistor of 20 ohms is in series with a resistor of 30 ohms. What is the total resistance in the circuit?

A. 50 ohms

B. 600 ohms

C. 10 ohms

D. 20 ohms

Show Answer & Explanation

Correct Answer: A

In a series circuit, total resistance is the sum of individual resistances. Thus, R_total = 20 ohms + 30 ohms = 50 ohms.

Medium

If a conductor has a resistance of 5 ohms, what is the current flowing through it when a voltage of 15 volts is applied?

A. 3 A

B. 2 A

C. 1 A

D. 4 A

Show Answer & Explanation

Correct Answer: A

Using Ohm's Law (V = IR), the current I can be calculated as I = V/R. Therefore, I = 15V / 5 ohms = 3 A.

Hard

A wire of resistance 10 ohms carries a current of 5 A. What is the potential difference across the wire?

A. 50 V

B. 2 V

C. 15 V

D. 25 V

Show Answer & Explanation

Correct Answer: A

According to Ohm's Law, V = IR. Here, V = 10 ohms * 5 A = 50 V.

Hard

If the resistance of a conductor is halved, how will the current change when a constant voltage is applied?

A. It remains the same

B. It doubles

C. It halves

D. It quadruples

Show Answer & Explanation

Correct Answer: B

According to Ohm's Law, I = V/R. Halving the resistance R leads to doubling the current I when V is constant.

Q10

Hard

A circuit contains three resistors in series with resistances of 4 ohms, 6 ohms, and 2 ohms. What is the total resistance?

A. 12 ohms

B. 10 ohms

C. 14 ohms

D. 8 ohms

Show Answer & Explanation

Correct Answer: A

Total resistance in series is the sum of individual resistances: R_total = 4 + 6 + 2 = 12 ohms.

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Current Electricity — NEET Physics Practice Questions Online

This page contains 1593 practice MCQs for the chapter Current Electricity in NEET Physics. The questions are organized by difficulty — 382 easy, 669 medium, 542 hard — so you can choose the right level for your preparation.

Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.