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16 Cards in this Set
- Front
- Back
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State two types of electric charge |
Positive and Negative charges |
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State the charge on an electron, a proton and a neutron |
- protons have a positive charge - electrons which have a negative charge - neutrons, which have no charge |
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Describe what a current is |
A current is the amount of charge in a circuit flowing per second. |
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Name the meter that you use to measure current |
An ammeter |
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Name the meter that you use to measure potential difference. |
A voltmeter |
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State the unit of potential difference |
volts (V) |
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State two differences between series and parallel circuits |
- In a series circuit there can only be one loop, but in a parallel circuit there can be more than one - You can draw a parallel circuit with both curved and straight lines, but you can only draw a series circuit with straight lines |
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State what happens to the total current as you add more branches in a parallel circuit |
The current in the other branches stays the same but the total increases. |
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State what is meant by resistance |
Each circuit has a different resistance. This tells you how easy or difficult it is for the charges to pass through the component. |
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State the unit of resistance |
Ohms (Ω) |
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Name the two poles of a magnet |
North poles and south poles |
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State two ways that you can find out the shape of a magnetic field |
You can put iron filings around the magnet or work it out using magnetic field lines |
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State the type of material you can use for the core of an electromagnet |
Most cores are made of iron. |
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State three things that affect the strength of an electromagnet |
- The number of turns, or loops, on the coil. More turns of wire will make a stronger electromagnet. - The current flowing in the wire. More current flowing in the wire will make a stronger electromagnet. - The type of core. Using a magnetic material in the core will make a stronger electromagnet. |
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State the type of magnet used to levitate a train |
Powerful electromagnets |
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State one use of an electromagnet in a scrap yard |
You can use it to move cars to a scrap yard. |
