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JEE Main 202120 JulyMorning Shift
Exam
JEE Main
Year
2021
Date
20 July
Shift
Morning Shift
Subject
Physics
Chapter
Electromagnetic Induction

JEE Main 2021 · 20 July · Morning Shift · Physics · Electromagnetic Induction

The arm PQ of a rectangular conductor is moving from x = 0 to x =...

The arm PQPQ of a rectangular conductor is moving from x=0x = 0 to x=2bx = 2b outwards and then inwards from x=2bx = 2b to x=0x = 0 as shown in the figure. A uniform magnetic field perpendicular to the plane is acting from x=0x = 0 to x=b.x = b . Identify the graph showing the variation of different quantities with distance:

The arm PQ of a rectangular conductor is moving from x = 0 to x = 2b outwards and then inwards from x = 2b to x = 0 as

The arm PQ of a rectangular conductor is moving from x = 0 to x = 2b outwards and then inwards from x = 2b to x = 0 as

Options

  1. AAA—Flux, BB—Power dissipated, CC—EMF
  2. BAA—Power dissipated, BB—Flux, C—EMFC — EMF
  3. CAA—Flux, B—EMFB — EMF, CC—Power dissipated
  4. DA—EMFA — EMF, BB—Power dissipated, CC—Flux

Correct answer

C. AA—Flux, B—EMFB — EMF, CC—Power dissipated

Step-by-step solution

As rod moves in field area increases upto x=bx = b, then field is absent and again flux is generated on return journey from x=bx = b to x=0x = 0. Thus plot AA for flux.
⇒e=−dϕdt⇒⇒ e = - \dfrac{dϕ}{dt} ⇒ curve BB for emfemf
⇒⇒ Power dissipated =vi⇒= vi ⇒ curve CC for power dissipated
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