An electric tea kettle has two heating coils. When one of the coils is switched on , boiling begins in `6 min`. When the other coil is switched on , boiling begins in `8 min`. In what time will the boiling begin if both coils are switched on simultaneously (i) in series and (ii) in parallel.

An electric tea kettle has two heating coils. When one of the coils is switched on, boiling begins in 6 min. When the other coil is switched on, the boiling begins in 8 min. In what time, will the boiling begin if both coils are switched on simultaneously (i) in series and (ii) in parallel.

An electric kettle has two heating coils. When one of them is switched on water in it boils in 6 minutes and when other is switched on water boils in 4 minutes. In what time will the water boil if both coil are switched on simultaneously

An electric kettle has two windings. When one of the n is switched on the kettle begins to boil in t_(1) minutes and when the other is switched on it begins to boil in t_(2) minutes. In what time will the kettle begin to boil if both windings are switched on simultaneously in series and a parallel?

An electric kettle has two coils. When one of these is switched on, the water in the kettle boils in 15 minutes. When the other is switched on, the water boils in 30 minutes. In how many minutes will water boil if the coils are connected in series and switched on?

A electric tea kettle has two heating coils. When first coil of resistance R_1 is switched on, the kettle begins to boil tea in 6 minutes. When second coil of resistance R_2 is switched on, the boiling begins in 8 minutes. The value of R_1 // R_2 is

An electric kettle has two coils. When one of these is switched on, the water in the kettle boils in 6 minutes. When the other coil is switched on, the water boils in 3 minutes. If the two coils are connected in series, find the time taken to boil the water in the kettle.

An electric kettle has two coils. When one of these is switched on, the water in the kettle boils in 6 minutes. When the other coil is switched on, the water boils in 3 minutes. If the two coils are connected in series, find the time taken to boil the water in the kettle.

An electric kettle has two coils. When one of these is switched on, the water in the kettle boils in 6 minutes. When the other coil is switched on, the water boils in 3 minutes. If the two coils are connected in series, find the time taken to boil the water in the kettle.