A bulb is rated at $5.0\, V , 100 \,mA$. Calculate its
$(i)$ power and $(ii)$ resistance.
A bulb is rated at $5.0\, V , 100 \,mA$. Calculate its
$(i)$ power and $(ii)$ resistance.
Given, $\quad V =5.0 V$
$I=100 mA =100 \times 10^{-3} A =0.1 A$
$P = VI =5.0 \times 0.1=0.5 W$
Also, $R =\frac{ V }{ I }=\frac{5.0}{0.1}$
$=50 \Omega$
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