Question

An electric bulb draws a current of 0.2 a when the voltage is 220 waltz calculate the amount of electric charge flowing through it in 1 hour

Answer 1

i = 0.2 A
v= 220v
t = 1h=60×60sec = 3600s
Q = ?
i = q/ t
0.2 = q /3600
q= 0.2 ×3600
q = 720C

Answer 2

The amount of electric charge flowing through it in 1 hour is 720 Coulomb.

Given:

The current drawn by the electric bulb, I = 0.2 A (Ampere)

The voltage, v = 220 v (Volts)

The amout of electric charge for one hour, Q = ? (Coulomb)

Solution:

Time, t = 1h

$=60\times 60\quad sec$

= 3600 s

We know that,

$I=\frac { Q }{ t }$

$0.2=\frac { Q }{ 3600}$

$Q= 0.2\times 3600$

= 720 C

Amount of electric charge for one hour, Q = 720 Coulomb.