JEE Main 2023 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 8 April 2023, Shift 1, Physics Q59

Question 59 of 90 in this shift, Physics question 29 of 30, Section B.

A current of

2\ \mathrm{A}

flows through a wire of cross-sectional area

25.0\ \mathrm{mm^2}

. The number of free electrons in a cubic meter are

2.0\times10^{28}

. The drift velocity of the electrons is ________

\times10^{-6}\ \mathrm{ms^{-1}}

(given, charge on electron

= 1.6\times10^{-19}\mathrm{C}

Official answer

NTA final key.

Chapter: Current Electricity
Topic: Ohm's Law and Resistance
Idea tested: Drift Velocity and Current

Same idea in other shifts

Asked 5× in all

8 Apr 2023, Shift 2 · Q60The number density of free electrons in copper is nearly $8 \times 10^{28}$ m $^{-3}$ . A copper wire has its area of cross section =…EasyNumerical value
10 Apr 2023, Shift 2 · Q50In a metallic conductor, under the effect of applied electric field, the free electrons of the conductorEasySingle correct
27 Jul 2022, Shift 2 · Q41(A) The drift velocity of electrons decreases with the increase in the temperature of conductor. (B) The drift velocity is inversely…MediumOther
17 Mar 2021, Shift 1 · Q5A current of 10 A exists in a wire of crosssectional area of 5 mm $^2$ with a drift velocity of $2\times10^{-3}$ ms $^{-1}$ . The number of…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.