Electricity Worksheet - GCSE - Intermediate

Electricity worksheet for Key Stage 4 / GCSE (Ages 14-16). Intermediate level science practice, aligned to the UK National Curriculum. Print-ready with answer key included.

Science•Key Stage 4 / GCSE (Ages 14-16)•Electricityintermediate

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Exploring Electricity: GCSE Science Worksheet

Key Stage 4 / GCSE (Ages 14-16) - Intermediate Level

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Instructions: This worksheet will help you understand key concepts in electricity, including circuits, Ohm's Law, and electrical power. Follow the instructions for each activity carefully and use the space provided to write your answers.

Understanding Ohm's Law

Use Ohm's Law (V=IR) to solve the following problems. Calculate the missing values for voltage (V), current (I), or resistance (R). Show all your working clearly.

1. If the current is 2 A and the resistance is 5 Ω, what is the voltage?

2. A circuit has a voltage of 12 V and a resistance of 4 Ω. Find the current.

3. The voltage across a resistor is 9 V and the current is 3 A. Calculate the resistance.

Series and Parallel Circuits

Identify whether the given circuits are series or parallel. Then, calculate the total resistance for each circuit. Use the formula for total resistance in series (R_total = R1 + R2 + ...) and parallel (1/R_total = 1/R1 + 1/R2 + ...).

1. Circuit A: Two resistors, 3 Ω and 6 Ω, connected end-to-end.

2. Circuit B: Two resistors, 4 Ω and 8 Ω, connected side-by-side.

Calculating Electrical Power

Use the power formula (P=IV) to calculate the power for each scenario. Show your calculations clearly.

1. A device operates with a current of 3 A and a voltage of 10 V. Calculate the power.

2. If a bulb has a power rating of 60 W and operates at 240 V, find the current flowing through it.

Energy Transfer in Circuits

Calculate the energy transferred using the formula E=VIt, where E is energy in joules, V is voltage, I is current, and t is time in seconds. Solve the following problems.

1. A heater runs at 230 V and 5 A for 2 hours. Calculate the energy transferred.

2. A battery provides 12 V and 2 A for 30 minutes. Determine the energy transferred.

I-V Characteristics

For each component, describe the I-V characteristic curve. Explain how the current changes with voltage and identify any unique features.

1. Resistor

2. Filament Lamp

3. Diode

Static Electricity

Explain the process of static electricity build-up and discharge. Use examples to illustrate your explanation.

Describe how static electricity is generated and discharged, using the example of rubbing a balloon on hair.

Mains Electricity and Safety

Answer the following questions about mains electricity and safety features. Use the information provided in your lessons.

1. What is the purpose of the earth wire in a plug?

2. Explain how a fuse works to protect a circuit.

Transformers and Voltage

Using the transformer equation (Vp/Vs = np/ns), solve the following problems. Calculate the missing values for primary or secondary voltages.

1. A transformer has 100 turns on the primary coil and 25 turns on the secondary coil. If the primary voltage is 240 V, what is the secondary voltage?

2. If a transformer steps up the voltage from 110 V to 330 V and the primary coil has 50 turns, how many turns are on the secondary coil?

Answer Key

Activity 1: 10 V ; 3 A ; 3 Ω

Activity 2: Series ; 9 Ω ; Parallel ; 2.67 Ω

Activity 3: 30 W ; 0.25 A

Activity 4: 8,280,000 J ; 43,200 J

Activity 5: Linear relationship ; Non-linear, increases then plateaus ; Current flows in one direction

Activity 6: Static electricity is generated by friction, causing electrons to transfer and build up charge. Discharge occurs when the charge is released, often as a spark.

Activity 7: It provides a path for fault current to flow to the ground, preventing electric shock ; A fuse contains a wire that melts when the current is too high, breaking the circuit.

Activity 8: 60 V ; 150 turns