Question

4. a) How much current will an electric bulb draw from a 220v source, if the resistance of the bulb
filament is 1200 ohm.
b) How much work is done in moving a charge of 2C across two points having a potential differe
12 V.​

Answer 1

a)Solution:

Given,

V=220 V

R=1200 ohm

since, I=V/R

Therefore, I =220/1200

=0.1833333 A

b) Solution:

Given,

Charge(Q)=2 C

potential difference=12 V

Since,

potential difference =work done/Charge

Therefore,

12=Work/2

Work = 24 J

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