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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\(\Omega\)
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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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