Test- Electricity And Magnitism

Question 1

Which of the following statements about electric charge is true?

A. Objects must be touching on another to exert electrical force.

B. Air cannot conduct electricity; it is conducted only by solid materials.

C. Opposite electric charges always repel one another.

D. Electrical forces act at a distance

Answer 1

Answer. D

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Question 2

Circuit that has more than one pathway for current to travel through

Answer 2

Answer. Series circuit

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Question 3

This exerts a force that causes other electric charges to move.

Answer 3

Answer. Conductors

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Question 4

Electric charges always flow from ______ areas to _____ areas.

Answer 4

Answer. Positive, negative

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Question 5

Which of the following will increase the resistance of a wire?

A. increasing the temperature of the wire

B. using silver instead of copper

C. Using a shorter wire

D. using a thicker/wider wire

Answer 5

Answer. A

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Question 6

When non-magnetic materials become attracted to magnets

Answer 6

Answer. Ferromagnitism

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Question 7

42. Charges can act at a distance by exerting a ______ ______ which is an example of _______.

Answer 7

Answer: electric field, induction

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Question 8

43. How is lightning created. Include which type of electric charge transfer it is

Answer 8

Answer: movement of clouds causes a build up of static electricity. When e- build up enough it induces a + charge on Earth.
Attraction becomes so great that e- go to Earth to neutralize- static discharge

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Question 9

44. Explain how a battery works

Answer 9

Answer: chem. Rxr- voltage difference between + and - terminals. When connected, this pushes current through wire due to voltage diff. e- flow from - to + end

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Question 10

45. List four factors that affect resistance in a circuit

Answer 10

Answer: material, size, length, temperature.

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Question 11

46. What is a better way to draw a resistor

Answer 11

Answer. Box with zigzag in it

Question 12

48. List two differences between series and parallel circuits and list a real-world example of each

Answer 12

Answer. Series= 1 path, all must work, ex-flashlight. Parallel= >1 path, can use one part at a time, ex- House

Question 13

53. Explain ferromagnetism. Make sure to include what is happening to the electrons in the atoms

Answer 13

Answer: when non magnetic objects are placed in a strong enough magnetic field and become magnetized due to poles within their atoms aligning all e- orient in same direction

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