Year 6 · Science · Electricity · Lesson 2
Voltage and brightness
Voltage and brightness: volts, how the number of cells and bulbs affects bulb brightness, buzzer volume and motor speed, and fair testing.
13-minute video lesson
Teaching, worked examples and 20 practice questions solved step by step.
Watch free for a monthWhat your child will learn
- Explain voltage
- Predict brightness changes
- Predict buzzer and motor changes
- Plan a fair test
The method
- What changed?
- More push?
- More current?
- Effect.
Key words: voltage, volts, brightness, current, filament, fair test.
Worked examples
The first three practice questions from the lesson, with every step.
Question 1
What is voltage?
- Step 1: Push
Answer: the push given by a cell
Question 2
What unit is voltage measured in?
- Step 1: v...
Answer: volts (V)
Question 3
What is the voltage of a typical cell?
- Step 1: 1.5
Answer: 1.5 V