AP EAMCET · PHYSICS · Electromagnetic Induction
When the current through an inductor is changed at from \(2 \mathrm{~A}\) to \(6 \mathrm{~A}\) in time \(2 \mathrm{~s}\), emf induced in it is \(3 \mathrm{~V}\). Then the inductance of the inductor is
- A \(1.4 \mathrm{H}\)
- B \(0.8 \mathrm{H}\)
- C \(1.5 \mathrm{H}\)
- D \(0.6 \mathrm{H}\)
Answer & Solution
Correct Answer
(C) \(1.5 \mathrm{H}\)
Step-by-step Solution
Detailed explanation
Inductance of the inductor is given as \(\begin{aligned} & \mathrm{L}=-\frac{\varepsilon}{\frac{\mathrm{di}}{\mathrm{dt}}} \\ & =\frac{3}{\frac{6-2}{2}}=\frac{3 \times 2}{4}=1.5 \mathrm{H}\end{aligned}\)
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