Question

The filament of an electric lamp draws a current of 0.4A which lights for 3 hours. Calculate the amount of charge that flows through the circuit.

Answer 1

$\mathtt{ \huge{\fbox{Solution :)}}}$

Given ,

• Current (I) = 0.4 amp
• Time (t) = 3 hr or 10800 sec

We know that , the rate of unit charge is called electric current

$\large \mathtt{ \fbox{Electric \: current \: (I) = \frac{q}{t} }}$

Thus ,

0.4 = q/10800

q = 0.4 × 10800

q = 4320 C

Hence , the charge is 4320 C

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