Electricity And Magnetism

Question 1

9. In a closed circuit containing one resister and one battery, if the voltage in the battery increases the current going through the resistor increases. Why does this occur

Answer 1

As the electrons are pushed more by the battery, they move faster through the circuit
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C2

Question 2

42. Charges can act at a distance by exerting an electric field which is an example of charging by ____

Answer 2

Induction
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Question 3

43. Explain how lightning is created

Answer 3

Static discharge/ e- builds up and induces a + charge in the earth/ attraction becomes great and neutralizes it
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Question 4

44. Explain how a battery works

Answer 4

Voltage difference between +and - terminals/ when connected this pushes current through wire
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C2

Question 5

49. What the given

Answer 5

V= 60

I=?

Question 6

51. What two ways keep a house from overheating

Answer 6

Fuse- a piece of metal that melts to open circuit
Circuit breaker- a piece of metal that bends to open circuit
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Question 7

52. What is an electromagnet

Answer 7

A temporary magnet made by placing a piece of iron in a current carrying coil of wire
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Question 8

53. Explain ferromagnetism

Answer 8

When no magnetic objects are placed in a strong magnetic field they become magnetized due to poles within their atoms aligning
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