Energy Storage MCQs

Practice Energy Storage MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Network TheoryEnergy Storage

A 10 microfarad capacitor initially at 20 V stores how much energy?

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Correct Answer: C. 2 mJ

Explanation: Stored energy is W=0.5CV^2=0.5×10e-6×20^2=0.002 J=2 mJ.

Reference: Standard network theory: capacitor energy numerical

Question 2

Network TheoryEnergy Storage

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Correct Answer: C. 16 J

Explanation: Inductor energy is W=0.5LI^2=0.5×2×4^2=16 J.

Reference: Standard network theory: inductor energy numerical