Two circuit diagrams illustrating electrical components and questions about current and resistance effects.
Circuit 3 diagram showing two cells, a motor, a 10Ω resistor, and a switch in series. Question asks about the effect of replacing the 10Ω resistor with a 20Ω resistor on motor speed. Circuit 4 diagram showing two cells, a bulb, a switch, and an ammeter in series. Questions ask for current when switch is open and closed.