Electricity

Question 1

What is the potential difference in a circuit?

Answer 1

Diff in electric charge between 2 points

Question 2

What is resistance?

Answer 2

describes object’s level of opposition to electric current

Question 3

What is the relationship between resistance, potential difference and current?

Answer 3

V=RI
R=V/I
I=V/R

Question 4

How does current split in a parallel circuit?

Answer 4

I (Branch 1) = I (Total) times (-1x resistance in branch 1)

Question 5

How does current split in a series circuit?

Answer 5

Current remains the same throughout a series circuit

Question 6

How does a short circuit happen?

Answer 6

Live wire - touches neutral wire - new path of minimal resistance - high current - fire

Question 7

What are two common units of energy and their relationship?

Answer 7

1. Joule and Watt/second or Kilowatt/hour
2. 1 joule = 1 watt times 1 second

Question 8

What are the two formulae of power?

Answer 8

P = Current x Voltage (Poison Ivy)
P = Energy/time

Question 9

What is the formula for electrical energy?

Answer 9

Energy = Power x time (Every Puppy Trains)