Electricity (Foundation 1)

(1) Potential Difference is measured in...?
Volts
Ohms
Amps
Watts
(2) Current is measured in...?
Volts
Ohms
Amps
Watts
(3) If the resistance of a series circuit is increased...?
The current decreases
The current increases
The ohms decrease
The ohms stay the same
(4) If three identical lamps are conected in series, then parallel..?
There is no difference in brightness.
The series lamps are brighter.
The parallel ones are brighter.
The lamps wont work in parallel.
(5) If two bar magnets are placed end to end (N-N) they will...?
Attract.
Repel.
Start to heat up.
Start to cool down.
(6) To make an electromagnet you need...?
A solenoid and a magnet.
A solenoid and and iron core.
A solenoid carrying a charge and a soft iron core.
A solenoid carrying a charge and a copper core.
(7) A wire carrying an electric charge...?
Glows blue.
Glows red.
Sparks.
Has a magnetic field
(8) Inside a magnetic field the wire in (7) will...?
Experience a force.
Conduct better.
Heat up.
Cool down.
(9) Static electricty is caused in insulators by...?
Heat.
Friction.
Hitting two piece of metal together.
magnetising them.
(10) Workers in a petrol refinery wear insulating suits...?
To prevent static charges building up and causing a fire.
To stop machines over heating.
To keep grit out of the oil.
To prevent the spread of infection.

      

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