Current Electricity JEE Main Questions 2025: Important Practice Questions with PYQs

Current Electricity JEE Main Questions 2025 : Current electricity is one of the important chapters carrying high weightage (approximately 9%) in the JEE Main 2025 exam. The questions in the JEE Main exam are asked in the form of MCQs. Students who are going to appear for the JEE Main exam can expect 3 to 4 questions from this chapter. Test takers can use these previous year's important questions Current Electricity JEE Main Questions 2025 to enhance their preparation and
to practice the chapter ‘Current Electricity’ thoroughly to crack the exam. Students will have to practice the questions from the topics drift velocity, Kirchoff & Ohm’s laws, electrical resistivity, electrical resistance, and others. Check the JEE Main 2025 current electricity important questions here.

Latest update: NTA has declared the JEE Main 2025 exam dates! JEE Main 2025 exam will be conducted between January 22 to 31, 2025.

Also read: JEE Main Application Form 2025

Check Also: JEE Main Previous Year Question Paper

JEE Main 2025 Current Electricity Important Questions

Check the important questions for current electricity here.

1. In a circuit, a cell with internal resistance r is connected to an external resistance R. The condition from the maximum current drawn from the cell is

• R = r
• R< r
• R > r
• R = 0

2. In the N cells parallel combination, we obtain:

• More voltage
• More Current
• Less voltage
• Less current

Correct Answer: B- More Current

3. 1 ampere current is equivalent to

• 6.25 x 1010 electrons S-1
• 2.25 x 1018 electrons S-1
• 6.25 x 1014 electrons S-1
• 2.25 x 1014 electrons S-1

Correct Answer: A- 6.25 x 1010 electrons S-1

4. If 25 percent part of the wire length is stretched by 25%, then the percentage change in wire resistance will be about

• 7%
• 14%
• 25%
• 62.5%

Correct Answer: B - 14%

5. A boy with 2 spare light bulbs in his drawer, one marked with 250 V and 100 W and the other marked with 240 V and 60 W. He tries to decide which of the below-listed assertions is correct.

• The 60 W light bulb has more resistance and therefore burns less brightly.
• The 60 W light bulb has less resistance and therefore burns less brightly.
• The 100 W bulb has more resistance and therefore burns more brightly.
• The 100 W bulb has less resistance and therefore burns less brightly.

Correct Answer: A- The 60 W light bulb has more resistance and therefore burns less brightly.

Download: JEE Main Syllabus 2025

6. A battery of 10 volts is connected to a resistance of 20 ohm through a variable resistance R. The amount of charge that has passed in the circuit in 4 minutes if the variable resistance R is increased at the rate of 5 ohm/min is:

• 120 coulomb
• 120 loge 2 coulomb
• 120/loge2 coulomb
• 60/loge2 coulomb

Correct Answer: B- 120 loge 2 coulomb

7. If a copper wire is stretched to make 0.1% longer, the percentage change in the resistance is

• 0.2% increase
• 0.2% decrease
• 0.1% increase
• 0.1 % decrease

Correct Answer: A- 0.2% increase

8. To get a maximum current in resistance of 3 Ω, one can use n parallel rows of m cells, each connected in series. If the total number of cells is 24 and the internal resistance is 0.5 ohm, then

• m = 12, n = 2
• m = 8, n = 3
• m = 2, n = 12
• m = 6, n = 4

Correct Answer: A- m = 12, n = 2

9. A current in a wire is given by the equation, l = 2t2 - 3t + 1, the charge through the cross-section of the wire in time interval t = 3 s to t = 5 s
10. In an atom, electrons revolve around the nucleus along a path of radius 0.72 A, making 9.4x1018 revolutions per second. Find the equivalent current. (e = 1.6 x 1019 C)
11. The resistance of a heating element is 99 Ω at room temperature. What is the temperature of the element if the resistance is found to be 116 Ω? (The temperature coefficient of the material of the resistor is 1.7 x 104 C-1)
12. The drift speed of electrons when 1.5 A of current flows in a copper wire of cross-sectional area 5 mm2 is v. If 9x1028.m3 is the electron density of copper, the value of v is mm/s is close to (take charge of electrons = 1.6 x 10-19 C).

• 3
• 0.2
• 2
• 0.02

Correct Answer: 0.02

Download Also: JEE Main Physics Syllabus 2025 PDF

13. An ideal battery of 4 V and resistance R are connected in series in the primary circuit of a potentiometer of 1 m length, 5 Ω resistance. The value of R to give a potential difference of 5 mV across 10 cm of potentiometer wire is

• 490
• 495
• 395
• 480

Correct Answer: C- 395

14. On interchanging the resistances, the balance point of a meter bridge shifts to the left by 10 cm. The resistance of the combination is 1 kΩ. How much was the resistance on the left slot before the interchange?

• 990
• 505
• 550
• 910

Correct Answer: C-550

15. A  constant voltage is applied between 2 ends of a metallic wire. If the length is halved and the radius of the wire is doubled, the rate of heat developed in the wire will be

• Increased 8 times
• Unchanged
• Doubled
• Halved

Correct Answer: increased 8 times

16. A 2 W carbon resistor is colour-coded with green, black, brown, and red. The maximum current that can be passed through this resistor is

• 20 mA
• 0.4 mA
• 100 mA
• 63 mA

Correct Answer: 20 mA

17. If a wire is stretched to make it 0.1% longer, its resistance will

• Increases by 0.05%
• Increase by 0.2%
• Decrease by 0.2%
• Decrease by 0.05%

Correct Answer: Increase by 0.2%

18. A thermocouple is made from two metals, antimony and bismuth. If one junction of the couple is kept hot and the other is kept cold, then an electric current will

• Flow from antimony to bismuth at the cold junction
• Flow from antimony to bismuth at the cold junction
• Flow from antimony to bismuth at the cold junction
• Flow from antimony to bismuth at the cold junction

Correct Answer: Flow from antimony to bismuth at the cold junction

Best Books for JEE Main 2025 Physics Syllabus

Here are the books that you can refer to during your current electricity preparation.

• Fundamentals of Physics by Halliday, Resnick, & Walker
• Concepts of Physics (Vol. 1 and 2) by H.C. Verma
• Understanding Physics by Freedman & Young
• Problems in physics by SS Krotov

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