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JEE Main 202429 JanuaryEvening Shift

Exam: JEE Main
Year: 2024
Date: 29 January
Shift: Evening Shift
Subject: Physics
Chapter: Electromagnetic Induction

JEE Main 2024 · 29 January · Evening Shift · Physics · Electromagnetic Induction

A horizontal straight wire 5m long extending from east to west...

A horizontal straight wire

5m

long extending from east to west falling freely at right angle to horizontal component of earth's magnetic field

0 . 60 \times {10}^{- 4}Wb{m}^{- 2}

. The instantaneous value of emf induced in the wire when its velocity is

10m{s}^{- 1}

is _______

\times {10}^{- 3}V

.

Correct answer

0

Step-by-step solution

Horizontal component of earth's magnetic field,

${B}_{H} = 0 . 60 \times {10}^{- 4}Wb{m}^{- 2}$ .

Induced $\text{emf}e = {B}_{H}vℓ$

$= 0 . 60 \times {10}^{- 4} \times 10 \times 5$

$= 3 \times {10}^{- 3}V$

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