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

less resistance and draws more current.

Step-by-step explanation:

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

`P=VI\\P=(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=(V^2)/(R)`, it can be inferred that a 100 W has less resistance as compared to a 50 W bulb.