When a known standard resistor of 2\(\Omega\) is connected to the 0.0cm end of a...

JAMB 1990

When a known standard resistor of 2\(\Omega\) is connected to the 0.0cm end of a meter bridge, the balance point is found to be at 55.0cm. What is the value of the unknown resistor?

A. 1.10\(\Omega\)
B. 1.64\(\Omega\)
C. 2.44\(\Omega\)
D. 27.50\(\Omega\)

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Correct Answer: Option B

Explanation

\(\frac{R_1}{R_2}\) = \(\frac{L_1}{R_2}\)

\(\frac{2}{R_2}\) = \(\frac{55}{45}\)

R = 1.64\(\Omega\)

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When a known standard resistor of 2\(\Omega\) is connected to the 0.0cm end of a...

Correct Answer: Option B

Explanation

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