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JEE Main 202227 JuneEvening Shift
Exam
JEE Main
Year
2022
Date
27 June
Shift
Evening Shift
Subject
Physics
Chapter
Magnetic Properties of Matter

JEE Main 2022 · 27 June · Evening Shift · Physics · Magnetic Properties of Matter

A metallic rod of length 20cm is placed in North-South direction...

A metallic rod of length 20cm20cm is placed in North-South direction and is moved at a constant speed of 20ms−120m{s}^{- 1} towards East. The horizontal component of the Earth's magnetic field at that place is 4×10−3T4 \times {10}^{- 3}T and the angle of dip is 45°45 °. The emf induced in the rod is _____ mVmV.A metallic rod of length 20cm is placed in North-South direction and is moved at a constant speed of 20m s ^ - 1

Correct answer

0

Step-by-step solution

A metallic rod of length 20cm is placed in North-South direction and is moved at a constant speed of 20m s ^ - 1

Emf produced is ε=BVL⊥v⊥ε = {B}_{V}{L}_{⊥}{v}_{⊥}

We know BVBH=tan⁡45°\dfrac{{B}_{V}}{{B}_{H}} = \tan 45 °, so BV=4×10−3T{B}_{V} = 4 \times {10}^{- 3}T

Then, ε=4×10−3×20×10−2×20ε = 4 \times {10}^{- 3} \times 20 \times {10}^{- 2} \times 20 =16mV= 16mV

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