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  • 1. AN ELECTRIC HEATER DRAWS A CURRENT OF 5A WHEN IT IS CONNECTED TO 110V. WHAT CURRENT WILL THE HEATER DRAW WHEN IT IS CONNECTED TO 220V?

1. AN ELECTRIC HEATER DRAWS A CURRENT OF 5A WHEN IT IS CONNECTED TO 110V. WHAT CURRENT WILL THE HEATER DRAW WHEN IT IS CONNECTED TO 220V?

Answers (1)

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

 

Posted by

shubham.krishnan

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