Question

An electric heater draws 0.5A of current from a 220 V source. What current will the heater draws if the source voltage is decreased to 110 V.​

Answer 1

Answer:

10 A

Explanation:

I = 5 Amperes

V = 110 V

by ohm's law.

V = I * R

110V = 5A * R

Therefore, R= 110/5 Ohms = 22 Ohms

So, Resistance of heater is 22 ohms which remains constant if voltage or current vary.

So in the second case when the voltage is 220 V.

220V = I * 22 {R= 22 ohms from equation (i)}

I = 220V/22Ohms = 10 A

SO THE ANSWER WILL BE 10 A

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