AQA GCSE Physics Unit 2.5

Matthew T
Quiz by , created over 5 years ago

Twenty questions on the fifth section of Unit 2 in AQA GCSE Physics: Mains electricity.

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Matthew T
Created by Matthew T over 5 years ago
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Question 1

Question
True or false? In alternating current, the potential difference switches between positive and negative values.
Answer
  • True
  • False

Question 2

Question
Which of these statements are true about the UK mains supply?
Answer
  • Frequency of 50Hz
  • Frequency of 60Hz
  • Peak voltages of +230 and -230V
  • Peak voltages of +325 and -325V
  • Direct voltage of 230V
  • Direct voltage of 325V

Question 3

Question
True or false? The device used to show how alternating potential difference varies with time is called a voltascope.
Answer
  • True
  • False

Question 4

Question
What is the peak voltage of an AC supply whose peak is 3.4cm from the centre and whose Y-gain control is 0.75V/cm?
Answer
  • 2.55V
  • 4.53V
  • 4.15V
  • 2.65V

Question 5

Question
What is the frequency of an AC supply if the length of one cycle is 4cm and the time-base control is 15ms/cm?
Answer
  • 60Hz
  • 0.06Hz
  • 16.67Hz
  • 0.02Hz

Question 6

Question
What colour cable is the live wire in a three-core cable?
Answer
  • Green and yellow
  • Brown
  • Blue

Question 7

Question
What colour cable is the neutral wire in a three-core cable?
Answer
  • Green and yellow
  • Brown
  • Blue

Question 8

Question
What colour cable is the earth wire in a three-core cable?
Answer
  • Green and yellow
  • Brown
  • Blue

Question 9

Question
True or false? Appliances with plastic cases such as hairdryers only need two-core cable as they are doubly-insulated and do not need to be earthed.
Answer
  • True
  • False

Question 10

Question
True or false? A circuit breaker is a piece of metal that melts if the current flowing through it is too large.
Answer
  • True
  • False

Question 11

Question
What fuse would you need to buy if an appliance drew 2.7A of current?
Answer
  • 1A
  • 2A
  • 3A
  • 5A
  • 13A

Question 12

Question
True or false? Residual current circuit breakers break if the current in the live wire is different to the current in the neutral wire.
Answer
  • True
  • False

Question 13

Question
Which of these equations connecting power, energy and time is correct?
Answer
  • P = E/t
  • P = t/E
  • P = Et

Question 14

Question
Which of these equations connecting power, current and potential difference is correct?
Answer
  • P = I/V
  • P = V/I
  • P = IV

Question 15

Question
What fuse would I buy if I bought a 230V, 1000W appliance?
Answer
  • 1A
  • 2A
  • 3A
  • 5A
  • 13A

Question 16

Question
How many units of charge would each electron carry if they carried 6A of current in 1 minute?
Answer
  • 10C
  • 0.1C
  • 360C

Question 17

Question
True or false? The equation connecting charge, potential difference and energy is Q = VE.
Answer
  • True
  • False

Question 18

Question
What would be the potential difference of circuit in which 2000J of energy were carried by electrons with a charge of 4C?
Answer
  • 8000V
  • 500V
  • 0.002V

Question 19

Question
True or false? Connecting too many appliances to a single socket can lead to overheating.
Answer
  • True
  • False

Question 20

Question
Which of these are considered energy-efficient bulbs?
Answer
  • Filament bulb
  • Compact fluorescent bulbs
  • Light-emitting diodes
  • Halogen bulbs