JEE Main 2023 · PhysicsNumerical answerNumerical valueEasyCalculation

JEE Main 13 April 2023, Shift 1, Physics Q60

Question 60 of 90 in this shift, Physics question 30 of 30, Section B.

A potential

V_o

is applied across a uniform wire of resistance R. The power dissipation is

P_1

. The wire is then cut into two equal halves and a potential of

V_o

is applied across the length of each half. The total power dissipation across two wires is

P_2

. The ratio

P_2 : P_1

\sqrt{x} : 1

. The value of

x

is ______________

Official answer

NTA final key.

Chapter: Current Electricity
Topic: Ohm's Law and Resistance
Idea tested: Joule Heating and Power

Same idea in other shifts

Asked 15× in all

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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.