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# Electricity

### Revision of Current Electricity and Electricity in the Home chapters

What are the units of voltage? Volts
What are the units of current? Amperes (Amps)
What are the units of resistance? Ohms
Name a device that can be used to measure voltage. Voltmeter (Potentiometer) or Multimeter
Name a device that is used to measure current. Ammeter or Multimeter
Name a device that is used to measure resistance. Ohmmeter or Multimeter
What is the relationship between voltage, current and resistance i.e. Ohms Law? V = I x R
What type of graph would you expect to see when investigating Ohm's Law? Straight line through the origin
Name the piece of equipment used to vary the current in the Ohm's Law experiment. Rheostat (Variable Resistor)
Name the three effects of an electric current. Magnetic, Heating and Chemcial effect
Give an everyday use of the magnetic effect of an electric current. Electromagnet in a scrapyard
Give an everyday use of the heating effect of an electric current. Kettle, Toaster or Electric Heater
Give an everyday use of the chemical effect of an electric current. Electrolysis or electroplating
If two bulbs are in series and another bulb is added in series, what would you observe? Bulbs would get dimmer
If two bulbs are in parallel and another bulb is added in parallel, what would you observe? Bulbs are all same brightness
If three bulbs are in series and one bulb is removed, what would you notice? All the bulbs stop working
What does A.C stand for? Alternating Current
What does D.C stand for? Direct Current
What does Direct Current mean? The current flows in one direction only.
What do you call substances that allow electric current to flow through them easily? Conductors
What do you call substances that do not allow electric current to flow through them easily? Insulators
What is the name of the brown wire in a plug? Live Wire
What colour is the neutral wire in a plug? Blue
What is the name of the green and yellow wire in a plug? Earth
Name the device in a plug that breaks the circuit if too much current is flowing through it. The Fuse
Which wire is always connected to the fuse in a plug? Live
Name the devices used in houses that can be reset if too much current flows and the power is turned off. Circuit Breaker
Created by: joeykenn

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