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Question

How much current will an electric geyser draw from a 220 V source, if the resistance of the geyser is 110 ohm?


A

4 A

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B

2 A

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C

1 A

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D

8 A

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Solution

The correct option is B

2 A


Ohm’s Law states that the current, I flowing through a given metallic wire in an electric circuit is directly proportional to the potential difference, V across the ends of it, provided its temperature remains the same.
I=VR
R is a constant for a given material at a given temperature and is called its resistance.
In the question, V=220 V and R=110 Ω
I=22010=2 A.


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