Question

An electric room heater draws a current of 2.4 ampere from the 120 volt supply line what current will this room heater draw when connected to 240 volt supply line?

Answer 1

An electric room heater draws a current of 2.4 A from the 120 V supply line.

So current, I = 2.4 A

Voltage, V = 120 V

Resistance, R = V/I

R = 120/2.4 = 50 Ω

The resistance will remain constant unless the room heater is changed.

Now when the room heater is connected to the 240 V supply line, the current drawn is:

I = V/R

I = 240/50 = 4.8 A

So the room heater will draw a 4.8 A current when connected to the 240 V supply line.

Hope this helps

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Answer 2

In first case ,

In first case ,I=2.4amp

In first case ,I=2.4ampV=120volt

In first case ,I=2.4ampV=120voltWe know that,

In first case ,I=2.4ampV=120voltWe know that,V=IR

In first case ,I=2.4ampV=120voltWe know that,V=IR120=2.4×R

In first case ,I=2.4ampV=120voltWe know that,V=IR120=2.4×RR=120/2.4=50ohm

In first case ,I=2.4ampV=120voltWe know that,V=IR120=2.4×RR=120/2.4=50ohmIn second case,

In first case ,I=2.4ampV=120voltWe know that,V=IR120=2.4×RR=120/2.4=50ohmIn second case,V=240volt,R=50ohm

In first case ,I=2.4ampV=120voltWe know that,V=IR120=2.4×RR=120/2.4=50ohmIn second case,V=240volt,R=50ohmV=IR

In first case ,I=2.4ampV=120voltWe know that,V=IR120=2.4×RR=120/2.4=50ohmIn second case,V=240volt,R=50ohmV=IR240=I×50

In first case ,I=2.4ampV=120voltWe know that,V=IR120=2.4×RR=120/2.4=50ohmIn second case,V=240volt,R=50ohmV=IR240=I×50I=4.8amp.