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GUJCET · Physics · Electromagnetic Induction
Energy required to establish a current of 4 A in a coil of self inductance \(L=200 mH\) is _________ .
- A 1.6 J
- B 0.40 J
- C 0.18 J
- D 0.16 J
Answer & Solution
Correct Answer
(A) 1.6 J
Step-by-step Solution
Detailed explanation
A
\(\begin{array}{l} U =\frac{1}{2} LI ^2 \\ U =\frac{1}{2} \times\left(200 \times 10^{-3}\right) \times(4)^2 \\ U =1.6 J\end{array}\)
\(\begin{array}{l} U =\frac{1}{2} LI ^2 \\ U =\frac{1}{2} \times\left(200 \times 10^{-3}\right) \times(4)^2 \\ U =1.6 J\end{array}\)
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