AIPMT PRELIMS2003Physics-Electricity
AIPMT PRELIMS 2003 Physics Power in Electrical Circuits MCQ Question
Type: MCQ-numerical-Medium-Class 12
An electric kettle has two heating coils. When one of the coils is connected to an a.c. source, the water in the kettle boils in 10 minutes. When the other coil is used the water boils in 40 minutes. If both the coils are connected in parallel, the time taken by the same quantity of water to boil will be :
A
8 min
B
4 min
C
25 min
D
15 min
Correct Answer
Option A
Detailed Explanation
When connected in parallel, the power is the sum of the powers of both coils, reducing the time to boil the water to 4 minutes.
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