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# Electricity Review

last edited by 8 months, 3 weeks ago

Electricity Review the following for the exam

1.  What does the word “static” mean?  How does it explain ‘static electricity’?

2.  What part of the atom is important for the study of electricity?  How does a positive charge form?  How does a negative charge form?

3.  Explain how rubbing 2 neutral objects together causes them to become charged.

4.  Describe the investigation utilizing the pith ball.

5.  Describe the investigations utilizing the electroscope;  charging by contact, charging by induction and grounding

6.   Compare the following terms based on their characteristics and give examples of each

a) conductor and insulator.   B) volt meter and ammeter   c) series and parrallel

7. State the Law of Attraction and Repulsion and indicate how the pairs of charges below interact.

negative & negative ________________

positive & negative ________________

negative & neutral ________________

positive & positive ________________

positive & neutral ________________

8.  Give each of the electrical variables below with the correct symbol, units and unit symbol.

Variable Symbol Name of Units Unit Symbol

current

charge

potential difference

energy

resistance

power

9.  Complete the following calculations involving resistance:

a) A light bulb passes through a current of 0.83 A when the potential difference across the

bulb is 120 V.  What is the electrical resistance of the bulb in ohms?

b)  A light bulb has a resistance of 4 ohms.  If the current is 1A what is the voltage?

c)  If the voltage of a light is 5V and the resistance is 2 ohms, what is the current through the light?

d)  How does the slope of a graph of potential difference and current relate to resistance?

10.  a)  Describe what happens to voltage of the battery and 2 loads in a series vs and parallel circuit.

b) Describe what happens to the current through the battery and 2 loads in is a series vs a parallel circuit.

c) How does the brightness of lights compare in series and parallel circuits.

11.  a) How is electricity generated in the province on Ontario?  Describe the primary way.

b)  Describe the benefits and disadvantages of nuclear.

c)  Describe the benefits and disadvantages of alternative energy sources.

d)  Describe how the "3 pillars of sustainability" should  be used to evaluate how to decide whether or not an alternative electricity source is used.