), current is inversely proportional to resistance. If resistance doubles, current is halved.
): The energy needed to move a charge between two points. Measured in Volts (V) using a voltmeter connected in parallel. Resistance (
Voltage (V)=Current (I)×Resistance (R)Voltage open paren cap V close paren equals Current open paren cap I close paren cross Resistance open paren cap R close paren 4. Series vs. Parallel Circuits f2 science electricity exercise top
If you are a Form 2 (F2) student, you have likely reached the turning point of your science syllabus: . It is a leap from Biology and Chemistry because you cannot see electrons. You can only see their effects—light, heat, and movement.
Look at the circuit described below: A battery is connected to two bulbs, Bulb X and Bulb Y. They are connected side-by-side (parallel). A switch controls only Bulb X. a) Draw the circuit diagram using standard symbols. b) If Bulb X breaks, will Bulb Y still light up? Explain why. ), current is inversely proportional to resistance
Before attempting exercises, ensure you understand:
Why do we wire our homes using Parallel circuits? Because if the TV turns off, we don't want the refrigerator and lights to turn off too! Measured in Volts (V) using a voltmeter connected
Explanation: In a series circuit, there is only one path for electrons. The number of electrons passing point A per second equals the number passing point B. Current is constant.
Using the formula Power (W) = Energy (J) / Time (s) or Power = V × I .
Calculate the effective (total) resistance of the circuit.