When a known standard resistor of 2\(\Omega\) is connected to the 0.0cm end of a...
PHYSICS
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\(\Omega\)
Correct Answer: B. 1.64\(\Omega\)
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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