Question

Q5. How much current will an electrical bulb draw from 220 V source if the resistance of the bulb is 1500 ohm ? If in place of a bulb, a heater of resistance 100 ohm is connected to the sources, calculate current drawn by
it. [2M)​

Answer 1

Case 1st for bulb

given v=220,r=1500

using ohm's law

V=IR

I=V/R. I=220/1500.

I=0.1467A

Case 2nd for heater

r=100,v=220 find I

I=V/R

I=220/100

I=2.2A

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