At what rate a single conductor should cut the magnetic flux so that current of 1.5 mA flows through it when a resistance of 5 Ω is connected across its ends? (a) 6 × 10⁻³ wb/s (b) 8 × 10⁻³ wb/s (c) 4 × 10⁻⁴ wb/s (d) 7.5 × 10⁻³ wb/s

Answer: (d). Rate of cutting flux = induced emf: (dφ)/(dt) = e = IR e = 1.5× 10⁻³× 5 = 7.5× 10⁻³ V So the answer is (d) 7.5× 10⁻³ Wb/s.

At what rate a single conductor should cut the magnetic flux so that… | MHT CET 2021 (23 Sep, Shift 1)

Q61MHT CET 2021 · 23 SEP · SHIFT 1Easy

Magnetic Flux & Faraday's Law

At what rate a single conductor should cut the magnetic flux so that current of $1.5\text{ mA}$ flows through it when a resistance of $5\,\Omega$ is connected across its ends?

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Answer: (d)

Rate of cutting flux = induced emf: $\frac{d\phi}{dt} = e = IR$
$e = 1.5\times 10^{-3}\times 5 = 7.5\times 10^{-3}$ V
So the answer is (d) $7.5\times 10^{-3}$ Wb/s.

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