A student assembles the circuit illustrated, leaving a gap at $XY$. She wants to place a component between $X$ and $Y$ so that she can change the lamp’s brightness. Which component should be used?
Physics 0625 · IGCSE · Electric circuits
A student assembles the circuit illustrated, leaving a gap at $XY$. She wants to place a component between $X$ and $Y$ so that she can change the lamp’s brightness. Which component should be used?