An alternating current supply is connected to an electric lamp which lights with the same...

WAEC 2015

An alternating current supply is connected to an electric lamp which lights with the same brightness as it does with direct current source emf 6v. The peak potential difference of the a.c supply is

A. 4.6v
B. 6.0v
C. 8.5v
D. 12.0v

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Correct Answer: Option C

Explanation

V_o = V\(\_{rms}\) x \(\sqrt{2}\)

V_o = 6 x 1.414

V_o = 8.484

= 8.5v

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An alternating current supply is connected to an electric lamp which lights with the same...

Correct Answer: Option C

Explanation

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