Answer to Question #92527 in Electric Circuits for Bhuvana

Question

Electric room heater draw current of 24A from 120V supply line what current will this room heater draw when connected to 240V supply line

Answer 1

Let's first find the resistance of the heater from the Ohm's Law:

$$R=\dfrac{V}{I} = \dfrac{120 V}{24 A} = 5 \Omega.$$

Then, using the Ohm's Law, we can find the current through the heater when it connected to 240 V supply line:

$$I = \dfrac{V}{R} = \dfrac{240 V}{5 \Omega} = 48 A.$$

Answer:

$I = 48 A.$