Physics · JEE

Important Questions: Current Electricity for JEE

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The most important Current Electricity questions for JEE cover conceptual traps, standard results, and numerical patterns from Electric current: drift velocity, mobility and their relation with electric current, Ohm's law, electrical resistance, I-V characteristics of Ohmic and non-ohmic conductors, Electrical energy and power, electrical resistivity and conductivity, Series and parallel combinations of resistors, temperature dependence of resistance, and more. Goodmarks provides 130+ high-yield MCQs with full solutions.

Focus on what matters most. These important Current Electricity questions cover high-weightage concepts from Electric current: drift velocity, mobility and their relation with electric current, Ohm's law, electrical resistance, I-V characteristics of Ohmic and non-ohmic conductors, Electrical energy and power, electrical resistivity and conductivity, Series and parallel combinations of resistors, temperature dependence of resistance, and more — the topics JEE repeats every year.

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Subtopics in Current Electricity

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Q1PhysicsUnit 12: Current Electricity

A straight conductor of uniform cross- section carried a current I. Let s=specific charge of an electron. The momentum of all the free electrons per unit length of the conductor, due to their drift velocities only, is

Q2PhysicsUnit 12: Current Electricity

In the circuit shown, the heat produced in

5 \Omega

resistor is 10 calorie/sec. The heat produced/sec in

4 \Omega

resistor will be :

Q3PhysicsUnit 12: Current Electricity

In a metallic conductor, electric current is thought to be due to the movement of

Q4PhysicsUnit 12: Current Electricity

The equivalent Resistance: This question has multiple correct options

Q5PhysicsUnit 12: Current Electricity

Between any two points in a circuit, the sum of all

\ldots \ldots . . . . . . .

is the same through any pathway.

Q6PhysicsUnit 12: Current Electricity

Q Type your question- and of fixed emf, the resistor

\boldsymbol{R}_{1}

has fixed resistance and the resistance of resistor

\boldsymbol{R}_{2}

can be varied (but

\boldsymbol{R}_{2}

is always nonzero). Then the electric power delivered to the resistor of resistance

R_{1}

is independent of the value of resistance

\boldsymbol{R}_{2}

Reason f potential difference across a fixed resistance is unchanged, the power delivered to the resistor remains constant.

Q7PhysicsUnit 12: Current Electricity

Fuse wire should be placed in the path of wire

Q8PhysicsUnit 12: Current Electricity

There are a large number of cells available, each marked

(6 V, 0.5 \Omega)

to be used to supply current to a device of resistance

0.75 \Omega,

requiring

24 A

current. How should the cells be arranged, so that power is transmitted to the load using minimum number of cells?

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Frequently asked questions

What makes a Current Electricity question "important" for JEE?

Important questions test core concepts that appear frequently across JEE Main and Advanced papers — definitions, standard formulas, and classic problem types.

Which subtopics in Current Electricity are high-weightage?

Key areas include Electric current: drift velocity, mobility and their relation with electric current, Ohm's law, electrical resistance, I-V characteristics of Ohmic and non-ohmic conductors, Electrical energy and power, electrical resistivity and conductivity, Series and parallel combinations of resistors, temperature dependence of resistance, and more. Prioritise these before moving to edge cases.

How many important questions should I revise?

Revise 30–50 important MCQs per unit in the last month before JEE. Focus on questions you got wrong at least once.

Can I practise only important questions on Goodmarks?

Pro users can filter by unit and subtopic to target high-yield areas. Free users can attempt sample questions on this page.