Question

If an electric heater consumes electricity at the rate of $500W$ and the potential difference between the two terminals of the electric circuit is $250V$, calculate the electric current passing through the heater and resistance of it respectively.

• A. $4A,125\Omega$
• B. $2A,125\Omega$
• C. $4A,250\Omega$
• D. $2A,250\Omega$

Answer 1

The correct option is B $2A,125\Omega$

Given, $P=5500W,V=250V$
as we know, $P=V\times i$
$500=250\times ii=2A$

Using Ohm's law: $V=iRR=\frac{V}{i}$
$R=\frac{250}{2}=125\Omega$