Question

An electric lamp uses energy at the rate of $48W$ on a $12V$ supply. How much charge passes through the lamp in $2s$ ?

• A. $0.25C$
• B. $0.50C$
• C. $2.0C$
• D. $8.0C$

Answer 1

The correct option is D $8.0C$

As we know that power(P)=V$\times$I
so,I=$\frac{P}{V}$
I=$\frac{48}{12}$=4ampere
now,q=I$\times$T
q=4$\times$2=8 coulomb