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QJEEM21Ph4eb5: JEE Main 2021 Physics - Class 12 JEEM21Ph4eb5 Solution: In the given figure the magnetic flux through the loop…

In the given figure the magnetic flux through the loop increases according to the relation ϕ\phi B(t) = 10t2 + 20t, where ϕ\phi B is in milliwebers and t is in seconds.

The magnitude of current through R = 2 Ω\Omega resistor at t = 5 s is ___________ mA.

JEE Main 2021 (Online) 27th July Evening Shift Physics - Electromagnetic Induction Question 71 English

Step-by-Step Verified Solution

∣∈∣=dϕdt\left| \in \right| = {{d\phi } \over {dt}} = 20t + 20 mV

∣i∣=∣∈∣R\left| i \right| = {{\left| \in \right|} \over R} = 10t + 10 mA

at t = 5

∣i∣\left| i \right| = 60 mA

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