Practice Electro Magnetism (10) - Electro Magnetism

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9 questions

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2 cards from this section. Quick, good the night before a test.
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6 questions · about 4 min · pass mark 70%. Hints available.
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3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What rule helps determine the direction of the magnetic field around a current-carrying wire?
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Think about where you point your thumb and fingers.
Question 2.
What is an electromagnet?
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It can switch OFF and ON.
3Question 3.
What rule determines the direction of a magnetic field due to a current?
- Right-Hand Rule
- Left-Hand Rule
- Oersted's Law
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Remember how you use your right hand.
4Question 4.
True or False: An electromagnet's polarity can be reversed by changing the direction of current.
- True
- False
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Think about how lights change color.
Question 5.
A solenoid has 50 turns and carries a current of 2 A. If you double the number of turns and the current remains the same, what happens to the magnetic field strength?
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Consider how the number of loops affects the overall strength.
Question 6.
If a coil of wire is placed in a magnetic field and current flows through it, what factors affect the force experienced by the coil?
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Use Fleming's Left-Hand Rule for guidance.

5 more questions in this section. Enroll free to practise them all.