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
• B. 2 A
• C. 1 A
• D. 8 A

Answer 1

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.
$I=\frac{V}{R}$
$R$ is a constant for a given material at a given temperature and is called its resistance.
In the question, $V=220V$ and $R=110\Omega$
$\Rightarrow I=\frac{220}{10}=2$ A.