Lesson 4.2.3.1
4.2.3.1 Direct and alternating potential difference Quiz: AQA Physics, Unit 2
20 questions
In partnership with Revision Ninja
Lesson 4.2.3.1, Direct and alternating potential difference: 20 multiple choice questions for the AQA GCSE Physics (8463), Unit 2: Electricity, written with Revision Ninja.
Host it live on the board and students join with a game code on their own devices, or revise alone with Free Play. The answers are revealed in the game.
The 20 questions
-
What is the frequency of the UK domestic electricity supply?
- 50 Hz
- 60 Hz
- 5 Hz
- 230 Hz
-
What is the approximate potential difference of the UK domestic supply?
- 12 V
- 110 V
- 230 V
- 400 V
-
What type of electrical supply is UK mains electricity?
- Alternating current
- Variable direct
- Direct current
- Static current
-
How does direct potential difference differ from alternating potential difference?
- Varies in magnitude
- Constant in direction
- Reverses direction
- Changes frequency
-
Which device is typically powered by a direct potential difference supply?
- Mains kettle
- Battery-powered torch
- Desk fan
- Wall socket
-
How many times per second does a 50 Hz supply reverse direction?
- 50 times
- 500 times
- 100 times
- 25 times
-
A UK mains supply of 230 V is connected to a lamp. What is the potential difference across the lamp?
- 115 V
- 0 V
- 230 V
- 400 V
-
What is the period of a 50 Hz mains supply?
- 50 s
- 0.2 s
- 0.02 s
- 0.5 s
-
What is the average potential difference of an alternating supply over a full cycle?
- 50 V
- Zero
- 115 V
- 230 V
-
What shape represents an alternating potential difference on an oscilloscope trace?
- Rising ramp
- Repeating wave
- Exponential decay
- Straight line
-
Why does a direct potential difference supply not change polarity?
- Same direction maintained
- Direction reverses
- Voltage is zero
- Frequency is zero
-
What are the standard values for UK mains frequency and potential difference?
- 60 Hz and 110 V
- 60 Hz and 230 V
- 50 Hz and 230 V
- 50 Hz and 110 V
-
What happens when measuring a mains AC supply with a voltmeter set to DC?
- Averages to zero
- Blows the fuse
- Reads steady 230 V
- Reads steady 325 V
-
Which quantity describes how many complete cycles an ac supply completes each second?
- Frequency
- Resistance
- Power
- Potential difference
-
Which device is typically powered by an alternating potential difference from the mains?
- Mobile phone
- Torch bulb
- Domestic toaster
- Car battery
-
Which description best fits a direct potential difference?
- Continuous reversal
- Constant direction
- Sinusoidal wave
- Constantly fluctuating
-
A 50 Hz ac supply is passed through a lamp for 1 s. How many complete cycles pass through the lamp?
- 1 cycle
- 100 cycles
- 25 cycles
- 50 cycles
-
What feature on a voltage-time graph shows a direct potential difference?
- Parabolic curve
- Steep gradient
- Horizontal line
- Sine wave
-
What does the term alternating mean in alternating potential difference?
- Repeatedly reverses
- Increases frequency
- Gradually decreases
- Stays constant
-
Which source produces a direct potential difference?
- Mains socket
- Step-up transformer
- National Grid
- Solar cell
Related quizzes
- Standard circuit diagram symbols Quiz · 4.2.1.1 · 20 questions
- Electrical charge and current Quiz · 4.2.1.2 · 20 questions
- Current, resistance and potential difference Quiz · 4.2.1.3 · 20 questions
- Resistors Quiz · 4.2.1.4 · 20 questions
- Series and parallel circuits Quiz · 4.2.2 · 20 questions
- Mains electricity Quiz · 4.2.3.2 · 20 questions
- Power Quiz · 4.2.4.1 · 20 questions
- Energy transfers in everyday appliances Quiz · 4.2.4.2 · 20 questions
- The National Grid Quiz · 4.2.4.3 · 20 questions
- Static charge Quiz · 4.2.5.1 · 20 questions