PF Sem 2 Final Review Guide Name: __Answer Key_____

1) Atoms have three types of particles. Label the three particles on the diagram.

2) Which of these subatomic particles is able to move around?

3) What is the build up of charges on an object called?

4) A balloon becomes negatively charged after being rubbed by a pelt. What type of charging is this?

5) Like charges ____________ and opposite

charges ____________.

6) In the lab, a comb/balloon was charged. Then the charged object was placed near a stream of water. What happens to the charges in the water?

7) What is this process called?

8) Draw a graph that shows the relationship

between the electrostatic force between the balloon and the wall as the two objects get closer together.

1.

2. 3.

4.

5.

6.

7. 8.

Electron)

Neutron)

Electron)

Static)Electricity)

Friction)

Polarization)

!

Proton)

Like)charges)repel)and)opposite)charges)attract)

The)negative)and)positive)charges)are)temporarily)separated.)

Elec

tros

tatic

Forc

e

PF Sem 2 Final Review Guide Name: __Answer Key_____

9) What direction does current in a circuit always flow?

10) How can you increase the voltage

of a circuit?

11) What is the correct way to connect batteries in order to increase the total voltage of a circuit?

12) Draw a series circuit with two light bulbs, 1 battery, and 1 switch.

Use the picture to the right for questions 13-16: 13) Which bulb is the brightest? 14) Explain the type(s) of circuits are shown in the picture. 15) What is the difference in brightness of bulb A and bulb B. 16) What happens to bulb A and bulb C if bulb B is unscrewed?

9.

10. 11. 12. 13. 14. 15. 16.

From)positive)to)negative.)

Add)another)battery)

In)series)connected)positive)to)negative)

)

Bulb)C)

A)&)B:)series)with)one)another))And)parallel)with)C)

They)are)the)same)if)their)resistance)is)the)same.)

Bulb)A)would)go)out)but)Bulb)C)would)remain)lit)the)same.)

PF Sem 2 Final Review Guide Name: __Answer Key_____

17. Provide the terms for the following definitions & the units that coincide with them a. Amount of charges flowing in a circuit b. How much energy there is per charge c. The obstructions to the flow of charge 18. Give three examples of resistors. 19. What happens to the current in a series circuit if the number of light bulbs is increased from 1 to 3.

20. What happens to the current in a circuit if you increase the voltage of a battery from 1.5V to a 9V. Use the picture to the right for questions 21-23: 21. What type of circuit is this? 22. Label on the diagram the voltage at each bulb: 23. What happens if one of the bulbs goes out?

17. 18. !

19. 20. 9V 21. 22. Label diagram 23.

B=!

A=!

a.!Current))G)amps)

b.!Voltage)G)volts)

c.!Resistance)G)ohms!

!

1.!Light)bulb)

2.!Resistor)

3.!Dimmer)switch)(variable)resistor))

Current)decreases))

Current)increases)as)voltage)increases.)))

Series)Circuit)

They)all)go)out.)

4.5)V) 4.5)V)

PF Sem 2 Final Review Guide Name: __Answer Key_____

Use the picture to the right for questions 24-27: 24. What type of circuit is this? 25. Label on the diagram the voltage at each bulb:

26. What happens if one of the bulbs goes out? 27. How could you increase the CURRENT of this circuit? 28. What is an electromagnet? How is it created? 29. List three ways to increase the strength of an electromagnet. 30. What does “electromagnetic induction” mean? 31. Name the 2 items you need in order to create electromagnetic induction? 32. What must be done with at least one of these 2 items in order for it to work and electricity to be produced? 33. What happens to the direction of the current as the magnet moves back and forth?

9V 24. 25. Label Diagram 26. 27. 28. 29. 30. 31. 32. 33.

9 V

One)must)be)moving.!

The)other)remains)lit.)

Add)a)battery)or)add)another)bulb)in)parallel.!

Current)flowing)through)a)coil)of)wire)(solenoid))produces)a)magnetic)field.!

Using)a)magnet)to)create)electricity.!

GIncrease)the)number)of)coils.)GAdd)an)iron)core.)GIncrease)the)current)through)the)wire.!

A)coil)of)wire)(solenoid))and)a)magnet.!

It)reverses.))The)current)flows)in)alternating)directions)creating)Alternating)Current)(AC).!

Parallel)Circuit)

9)V)

9)V)