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18 36 ML OF P...

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18 36 ML OF PURE WATER TAKE 100 SEC TO EVAPORATE FROM VESSEL AND HEATER CONNECTED TO AN ELECTRIC SOURCE DELIVER 806 WATT HEAT OF VAPOURISATION OF WATER IS

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Q. 36 ml of pure water takes 100 sec to evaporate from a vessel and heater connected to an electric source which delivers 806 watts. The

{Δ H}_{v a p o r i z a t i o n}

H_{2} O

36 m L

of pure water takes

100

sec to everyone from a vessel and heater connected to as electric source which delivers

806 w a t t .

Δ H_{v a p o r i z a t i o n}

H_{2} O

36 m L

of pure water takes

100 s e c

to evaporate from a vessel and heater connected to an electric source which delivers

806 w a t t

Δ H_{v a p o r i z a t i o n}

H_{2} O

Q. An electric immersion heater is switched on for

8

minutes. The heat supplied by it raises the temperature of

500

g of water from

10^{o}

60^{o}

C. Calculate the power of heater in watts.

Q. An electric lamp of resistance

100 Ω

, a toaster of resistance

50 Ω

and a water filter of resistance

500 Ω

are connected in parallel to a

220 V

source. What is the resistance of an electric iron connected to the same source and takes as much current as all three appliances and what is the current through it ?

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