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Electric Current and Drift Velocity for JEE: 26 solved questions

Real JEE paper questions on electric current and drift velocity, part of current electricity. Each opens with the options, the correct answer and a step-by-step solution. Papers run from 2008 to 2026. No sign-in needed to read them.

What this topic asks

• Drift velocity, mobility and current density — 20 questions
• Current and charge flow — 6 questions

All 26 questions with solutions

• Current passing through a wire as function of time is given as I(t)=0.02t+0.01 A. The charge that will flow t… JEE Main 4th April 1st Shift 2025
• The electric current through a wire varies with time as I=I₀+β t, where I₀=20 A and β=3 A/s. The amount of el… JEE Main 29th Jan 1st Shift 2024
• In a metallic conductor, under the effect of applied electric field, the free electrons of the conductor JEE Main 10th April 2nd Shift 2023
• The charge flowing in a conductor changes with time as Q(t)=α t-β t²+γ t³, where α, β and γ are constants. Mi… JEE Main 30th Jan 1st Shift 2023
• The drift velocity of electrons for a conductor connected in an electrical circuit is V_d. The conductor is n… JEE Main 31st Jan 1st Shift 2023
• (A) The drift velocity of electrons decreases with the increase in the temperature of conductor. (B) The drif… JEE Main 27th July 2nd Shift 2022
• A current of 5 A is passing through a non-linear magnesium wire of cross-section 0.04 m². At every point the… JEE Main 20th July 1st Shift 2021
• In the given figure, a battery of emf E is connected across a conductor PQ of length l and different area of… JEE Main 27th July 1st Shift 2021
• A current of 10 A exists in a wire of cross sectional area of 5 mm² with a drift velocity of 2×10⁻³ m s⁻¹. Th… JEE Main 17th March 1st Shift 2021
• A current through a wire depends on time as i=α₀ t+β t², where α₀=20 A s⁻¹ and β=8 A s⁻². Find the charge cro… JEE Main 24th Feb 1st Shift 2021
• In a conductor, if the number of conduction electrons per unit volume is 8.5×10²⁸ m⁻³ and mean free time is 2… JEE Main 9th April 2nd Shift 2019
• A current of 5 A passes through a copper conductor (resistivity =1.7×10⁻⁸ Ω m) of radius of cross-section 5 m… JEE Main 10th April 1st Shift 2019
• Drift speed of electrons, when 1.5 A of current flows in a copper wire of cross section 5 mm², is v. If the e… JEE Main 9th Jan 1st Shift 2019
• The charge on a capacitor plate in a circuit, as a function of time, is shown in the figure. What is the valu… JEE Main 12th Jan 2nd Shift 2019
• A copper rod of cross-sectional area A carries a uniform current I through it. At temperature T, if the volum… JEE Main Online 2018
• When 5 V potential difference is applied across a wire of length 0.1 m, the drift speed of electrons is 2.5×1… JEE Main 2015
• Consider a block of conducting material of resistivity ρ shown in the figure. Current I enters at A and leave… JEE Main 2008
• Consider a block of conducting material of resistivity ρ shown in the figure. Current I enters at A and leave… JEE Main 2008
• A cylindrical conductor of length 2 m and area of cross-section 0.2 mm² carries an electric current of 1.6 A… JEE Main 22nd Jan 2nd Shift 2026
• The current in a conductor is expressed as I=3t²+4t³, where I is in Ampere and t is in second. The amount of… JEE Main 1st Feb 1st Shift 2024
• A current of 2 A flows through a wire of cross-sectional area 25.0 mm². The number of free electrons in a cub… JEE Main 8th April 1st Shift 2023
• The number density of free electrons in copper is nearly 8×10²⁸ m⁻³. A copper wire has its area of cross sect… JEE Main 8th April 2nd Shift 2023
• A 1 m long copper wire carries a current of 1 A. If the cross section of the wire is 2.0 mm² and the resistiv… JEE Main 27th July 1st Shift 2022
• The current density in a cylindrical wire of radius 4 mm is 4×10⁶ A m⁻². The current through the outer portio… JEE Main 27th June 1st Shift 2022
• The current density in a cylindrical wire of radius r=4.0 mm is 1.0×10⁶ A/m². The current through the outer p… JEE Main 27th June 2nd Shift 2022
• A cylindrical wire of radius 0.5 mm and conductivity 5×10⁷ S/m is subjected to an electric field of 10 mV/m.… JEE Main 24th Feb 2nd Shift 2021