Two heaters A and B are in parallel across supply voltage V.
Heater A produces 500 kcal in 20 minutes and B produces 1000 kcal in 10 minutes.
The resistance of A is 10 ohms.
What is the resistance of B, if the same heaters are connected in series voltage V?
A. 0.14 ohms
B. 4.5 ohms
C. 2.5 ohms
D. 4.5 ohms
Show Answer
Answer: C
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