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Magnetics question

2023 · 30 Jan · Shift 2 · Q60
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Magnetics question

2023 · 30 Jan · Shift 2 · Q60

JEE MainPhysicsMagneticsMCQ+4 / −1
A current carrying rectangular loop PQRS is made of uniform wire. The length PR=QS=5 cmP R=Q S=5 \mathrm{~cm}PR=QS=5 cm and PQ=RS=100 cmP Q=R S=100 \mathrm{~cm}PQ=RS=100 cm. If ammeter current reading changes from I to 2I2 I2I, the ratio of magnetic forces per unit length on the wire PQP QPQ due to wire RSR SRS in the two cases respectively (fPQI:fPQ2t)\left(f_{P Q}^I: f_{P Q}^{2 t}\right)(fPQI​:fPQ2t​) is: JEE Main 2023 (Online) 30th January Evening Shift Physics - Magnetic Effect of Current Question 77 English
  1. A
    1 : 4
  2. B
    1 : 3
  3. C
    1 : 2
  4. D
    1 : 5
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