Question

Two electric bulbs $A$ and $B$ are rated $60$ and $100W$, respectively. If they are connected in parallel to the same source, then

• A. both the bulbs draw the same current
• B. bulb $A$ draws more current than bulb $B$
• C. bulb $B$ draws more current than bulb $A$
• D. currents drawn in the bulbs are in the ratio of their resistances

Answer 1

Answer: (C)

Given $P_A=60W,P_B=100W$. We know that current flowing through the bulb is $I=P/V$. We also know that as both the bulbs are connected in parallel, potential difference $(V)$ across both the bulbs is the same. Thus, $I\propto P$. Since the power of bulb $B$ is greater than that of bulb $A$, bulb $B$ draws more current than bulb $A$.