One filament takes 10min to heat a kettle and another takes 15 min. If connected in parallel they combindly take………min to heat the same kettle:

An electric kettle has tow heating coils. When one of the coils connected to an AC source, the water in the kettle boils in 10 min. when the other coil is used the water boils in 40 min. if both the coils are connected in parallel, the time taken by the same quantity of water of boil will be

An electric kettle has tow heating coils. When one of the coils connected to an AC source, the water in the kettle boils in 10 min. when the other coil is used the water boils in 40 min. if both the coils are connected in parallel, the time taken by the same quantity of water of boil will be

An electric kettle has tow heating coils. When one of the coils connected to an AC source, the water in the kettle boils in 10 min. when the other coil is used the water boils in 40 min. if both the coils are connected in parallel, the time taken by the same quantity of water of boil will be

A coil takes 15 min to boil a certain amount of water, another coil takes 20 min for the same process. Time taken to boil the same amount of water when both coil are connected in series

A coil takes 15 min to boil a certain amount of water, another coil takes 20 min for the same process. Time taken to boil the same amount of water when both coil are connected in series

An electric kettle has two heating elements. When one element is connected to an a.c. source the water boils in 10 min. When the other element is used the water boils in 40 min. If both elements are connected in parallel, the time taken by same quantity of water to boil is

One heater coil takes time t_1 to heat a glass of water and another takes time t_2 to heat the same amount of water. How much time will it take to heat the same amount of water when the two are connected in series and when the two are connected in parallel ? voltage applied is same in all cases.

A heating coil takes of 6 min to boil certain amount of milk. Another heating coil takes 3 min to boil same amount of milk. Supply voltage is same. When the coils are connected in parallel,time taken to boil same amount of milk is