It takes 4 minutes to boil a quantity of water using an electrical heating coil.
PHYSICS
WAEC 2009
It takes 4 minutes to boil a quantity of water using an electrical heating coil. How long will it take to boil the same quantity of water using the same coil if the current is doubled? [Neglect any external heat losses]
- A. 8 minutes
- B. 4 minutes
- C. 2 minutes
- D. 1 minute
Correct Answer: C. 2 minutes
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