Test - Unit 8 Electricity And Magnetism

Question 1

43. What type of electric charge is lightning.

Answer 1

Induction

Unit 8, Concept 1, Page 5

Question 2

44. Which direction does electric current flow.

Answer 2

Negative to Positive

Unit 8, Concept 2, Page 7

Question 3

52. Describe what an electromagnet is.

Answer 3

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

Unit 8, Concept 4, Page 26

Question 4

53. Explain Ferromagnetism

Answer 4

Phenomenon where objects placed in a strong magnetic field become magnetized due to the poles within their atoms aligning

Unit 8, Concept 4, Page 25

Question 5

Laser printers work with the use of heat and positive and negative charges. The laser etches a negative charge on spots of the printer drum in the form of text or images. The plastic ink dust is attracted to the places on the drum with this negative charge. What is the charge of the plastic ink dots themselves

Answer 5

Positive

Unit 8, Concept 1, Page 3

Question 6

Electric charges always flow from ______ areas to _____ areas.

Answer 6

Negative to Positive

Unit 8, Concept 2, Page 7