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Precautions to Be Taken While Using Electricity

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certain amount of water in 15 minutes and other heater coil same amount of water in 10 minutes time taken to boil same amount of water when both are used in parallel is

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An electric heater can boil a certain amount of water in 10 minutes and another heater can do it in 15 minutes, both working at the same voltage. If the two heaters are connected parallel across the same voltage as before, how much time will they take to boil the same amount of water?

1

3

minutes to boil a given amount of water. Heater-

2

6

t_{1}

t_{2}

are the time taken to boil the same amount of water, when the two heaters are connected in series and parallel, respectively, then

\frac{t_{1}}{t_{2}} = ?

[

Assume same cell is connected in all the cases

]

Q. An electric kettle has two coils. When one coil is connected to the ac mains, the water in the kettle boils in

10 m i n u t e s

. When the other coil is used, the same quantity of water takes

15 m i n u t e s

to boil. The time taken by the same quantity of water to boil if the two coils are connected in parallel is

Q. 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 :

Q. An electric kettle has two coils. When one coil is connected to the AC mains the water in the kettle boils in 10 minutes. When the other coil is used the same quantity of water takes 15 minutes to boil. How long will it take for the same quantity of water to boil if the two coils are connected in parallel?

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Precautions to Be Taken While Using Electricity

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