Electromagnets year 8
Assessment
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author Lata
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Physics
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8th Grade
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124 plays
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Medium
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8 questions
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1.
Multiple Choice
The magnetic field around a straight wire carrying an electric current has:
A circular shape
A diamond shape
A square shape
An oval shape
2.
Multiple Choice
Which of the following is NOT true about the magnetic field around a coil of wire carrying a current?
Changing the direction of the current will reverse the poles
Increasing the number of coils will increase the strength
Making the coil wider will increase the strength
Putting an iron core into the coil will increase the strength
3.
Multiple Choice
The magnetic field around a coil of wire carrying current:
Is a circular shape
Is a diamond shape
Is a square shape
Is the same shape as around a bar magnet
4.
Multiple Choice
Which of the following is a difference between an electromagnet and a permanent bar magnet?
Electromagnets are stronger
Electromagnets can be turned off
Permanent magnets are stronger
Permanent magnets can be turned off
5.
Multiple Choice
Which of the following uses an electromagnetic effect?
Iron
Light bulb
Toaster
Washing machine
6.
Multiple Choice
An electromagnet on a crane is used in a scrapyard because:
It can be turned on and off
It can't be turned on and off
It is stronger than a permanent magnet
It is weaker than a permanent magnet
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