railway RRB Technician Grade 1 Mock Test 2024 Physics Electromagnetic Oscillations and Alternating Current Alternating Current
An electric kettle has two heating coils. When one of the coil is connected to an alternating current source the water in the kettle boils in 10 minutes. When the other coil is used, the same quantity of water takes 15 minutes in boil. How long will it take for the same quantity of water to boil, if the two coils are connected in parallel ?
1
6 minute
2
12 minute
3
18 minute
4
24 minute