The amount of electrical energy needed to move a unit charge between two points. SI Unit: Volt (V).
Draw a circuit with a battery, switch, bulb, ammeter (to measure current through bulb), and voltmeter (to measure voltage across bulb).
A 12 V battery is connected to a 4 Ω resistor. What is the current? f2 science electricity exercise top
The material that gains electrons becomes negatively charged.
Understanding how components behave in different circuit designs is critical for solving F2 science problems. Series Circuit Parallel Circuit Same everywhere ( Splits across branches ( Voltage ( ) Shared across components ( Same across all branches ( Total Resistance ( ) Increases ( Decreases ( Component Failure One breaks, the whole circuit fails. One breaks, other branches still function. Top Exam Questions and Exercises The amount of electrical energy needed to move
Three resistors: 2 Ω, 3 Ω, and 5 Ω are in series with a 20 V battery. Find: a) Total resistance b) Circuit current c) Voltage across the 3 Ω resistor
| Feature | Series Circuit | Parallel Circuit | | :--- | :--- | :--- | | | The current is the same everywhere in the circuit. | The total current is divided between the different branches. | | Voltage | The total voltage is shared between the components. | The voltage is the same across each branch. | | Resistance | The total resistance is the sum of all resistances: ( R_t = R_1 + R_2 + R_3 + ... ) | The reciprocal of the total resistance is the sum of the reciprocals: ( \frac1R_t = \frac1R_1 + \frac1R_2 + \frac1R_3 + ... ) | | Component Failure | If one component fails (e.g., a bulb blows), the circuit is broken and all components stop working. | If one branch fails, current continues to flow through the other branches, and they continue to function. | | Switches | A single switch controls the entire circuit. | Multiple switches can control individual branches. | | Brightness | Adding more components in series makes all of them dimmer. | Adding more branches in parallel does not affect the brightness of the existing components. | A 12 V battery is connected to a 4 Ω resistor
Master F2 Science: Electricity Essentials Struggling with circuit diagrams or voltage drops? This guide breaks down the core concepts of the unit to help you ace your next exercise. 1. The Basics of Charge Electricity starts with tiny particles. Protons: Positive (+) charge. Electrons: Negative (-) charge.
(though basic for F2, it helps with resistance concepts) and power calculations.
Electricity is all around you. Whenever you use a device, think about the science behind it.