The correct option is B. Decrease the length of the wire between the switch and the battery.
Resistivity of wire
The resistivity of a wire is the measure of the opposition to the flow of current offered by the wire.
ρ = RA/L
RA = ρL
R = ρL/A
where;
- ρ is resistivity of the wire
- R is resistance of the wire
- L is length
- A is area
Decrease in length of the wire will cause a decrease in the resistance of the wire, and it will increase the current flowing in the wire, causing the bulb to glow brighter.
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