Electricity And Magnetism Test

Question 1

43. Explain how lightning s created. Include which type of electric charge transfer it is.

Answer 1

U8C4
Movement of clouds causes a build up of static electricity.
When e- build up enough it indvies a + change on earth.
Attraction becomes so great that e- go to earth to neutralize static discharge.

Question 2

44. Explain how a battery works.

Answer 2

U8C3
Chem rxn voltage difference between ++- terminals when connected, this pushes current thought wire due to voltage diff
E- flow from -end to +end.

Question 3

40. Electric charges flow from— voltage to — voltage

Answer 3

U8C2

Electric charges flow from high voltage to low voltage.

Question 4

Electric charges always flow from — areas to — areas

Answer 4

U8C1

Electric currents always flows from negative areas to positive areas.

Question 5

Which of the following statements about electric charge is true.

Answer 5

Electrical forces act at a distance

Question 6

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

Answer 6

U8C3

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

Question 7

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

Answer 7

U8C2

Electric fields

Question 8

Providing a path that allows electric charges to travel directly into the earth rather than traveling through a building.

Answer 8

U8C3

Grounding