Question

To increase the brightness of a desk lamp, a student replaces a 50-watt incandescent lightbulb with a 100-watt incandescent lightbulb. Compared to the 50-watt lightbulb, the 100-watt lightbulb has _________.

Answer 1

Answer:

less resistance and draws more current.

Explanation:

Power is related to current, voltage and resistance as follows:

$P=VI\\P=\frac{V^2}{R}$

The voltage source is same and a 50 W bulb is replaced by 100 W bulb.

From the relation $P=VI$, it can be inferred that a 100 W draws more current.

From the relation, $P=\frac{V^2}{R}$, it can be inferred that a 100 W has less resistance as compared to a 50 W bulb.