A voltage of V = 10 Cos 10πt V flows

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Target Exam

CUET

Subject

Physics

Chapter

Alternating Current

Question:

A voltage of V = 10 Cos 10πt V flows through a resistor of 20 \(\Omega \). What will be the RMS current flowing through it?

Options:

2.86

0.2

0.5

0.13 A

Correct Answer:

0.13 A

Explanation:

I = \(\frac{V}{R}\) = \(\frac{10 Cos 10πt V}{20 \Omega }\) = 0.2 Cos 10πt A

Irms = 0.636I_o = 0.636 x 0.2 A = 0.13 A