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Use the diagram above to calculate the current, I.

Physics
WAEC 2010

Use the diagram above to calculate the current, I.
  • A. 0.60A
  • B. 0.97A
  • C. 1.03A
  • D. 5.00A
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Correct Answer: Option B
Explanation
\(\frac{1}{R} = \frac{1}{R_1} + \frac{1}{R_2}\)

= \(\frac{1}{6} + \frac{1}{4}\)

R = \(\frac{12}{5} = 2.5\Omega\)

R = 2.4 + 10 = 12.4

V = IR

I = \(\frac{v}{R} = \frac{12}{12.4} = 0.97\)

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