A 12Ω resistor dissipates 8kJ of heat in 20s. Calculate the current through the resistor...
PHYSICSWAEC 2012
A 12Ω resistor dissipates 8kJ of heat in 20s. Calculate the current through the resistor
- A. 5.8A
- B. 6.9A
- C. 30.0A
- D. 33.3A
Correct Answer: A. 5.8A
Explanation
Q = I2Rt
I = \(\sqrt{\frac{Q}{Rt}}\)
= \(\sqrt{\frac{8000}{12 \times 20}}\)
= 5.8
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