GCSE Electricity

What is the voltage of mains electricity in the UK National Grid?

• 120 V
• 220 V
• 230 V
• None of these

What is the frequency of alternating current in the UK National Grid?

• 60 Hz
• 50 Hz
• 230 V
• 120 V

the type of current that is used in mains electricity

• appealing current
• diverting current
• alternating current
• direct current

What is the power of a 20V bulb with 5A through it?

• 100W
• 100V
• 6.3W
• 6.3A

What is the current through a 11V bulb with a power of 99W?

• 9W
• 9A
• 60V
• 60A

A _________ is a plug or cartridge containing a strip of metal that melts when more than a specified amount of current passes through it.

• fuse
• breaker
• circuit
• panel

Which wire is connected to a fuse in a UK plug?

• Live

• Neutral

• Earth

• Positive

Tranformers are used in the National Grid to...

• increase or decrease the current

• increases or decrease the potential difference

• convert the energy to electrical energy

• speed up the electrons in the circuit

Alternating current is used because...

• it can be easily changed and therefore is suitable for long distance travel

• it remains constant and is therefore suitable for long distance travel

• it uses less energy than direct current and therefore less overall energy is used

• it doesn't degrade the wires and therefore they last longer

Which one is a Fuse?

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