Question

in a circuit diagram, what does this symbol represent?
o a resistor
a light bulb
a battery
a switch

Explanation:

In circuit diagrams, the symbol shown (with a gap and a lever - like part) is the standard symbol for a switch. A resistor has a different symbol (usually a zig - zag line), a light bulb has a symbol with a circle and a filament - like line inside, and a battery has a symbol with long and short lines (representing positive and negative terminals). So this symbol represents a switch.

Answer:

D. a switch