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Universal Solvent

A heater boil...

Question

A heater boils certain amount of water in 15 minutes another eat for boils same amount of water train 10 minutes time taken to boil same amount of water when they both have in parallel

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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 heater, operating at

220 V

5 l

5 minutes

. If it is used on a

110 V

line, it will boil the same amount of water in:

Q. A heater boils 1 kg of water in time

t_{1}

and another heater boils the same water in time

t_{2}

. If both are connected in series, the combination will boil the same water in time:

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

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