Electricity

Question 1

What is voltage?

Answer 1

energy per unit charge; an electric force which drives an electric current between two points.

Question 2

What is the formula for voltage?

Answer 2

V=I x R (Current x Resistance)

Question 3

How do you work out the the resistance of two or more components after each other across a parallel circuit ?

Answer 3

inverse each component and add them together, then inverse the total of the inversed components., e.g.
two bulbs of 5ohm resistance each:
1/5 + 1/5 = 2/5
2/5^-1= 5/2

therefore total resistance equals 2.5 Ohms

Question 4

What is the number of Joules in an electron volt?

Answer 4

1.6 x10 ^ -19 J

Question 5

What is the formula for power?

Answer 5

P = I ^ 2xR ( Current^2 x resistance)

Question 6

What is the formula for power involving voltage?

Answer 6

P=VxI (voltage x current)

Question 7

What is resistivity?

Answer 7

A quantification of how strongly an object resists or conducts an electrical current

Question 8

What is the formula of resistivity?

Answer 8

p= ( R x A ) / L

(resistance x c.s. Area) / length

Question 9

What is another formula for voltage involving the work done ?

Answer 9

V = W / Q
(work done / charge)

[EXPLAIN WORK DONE?

Question 10

What is a current?

Answer 10

Rate of flow of electrical charge in a circuit.

[UNSURE, use your own words]

Question 11

What is the formula for Current?

Answer 11

I = Q / t

charge, measured in number of Coulombs / time

Question 12

What is resistance measured in?

Answer 12

Ohms, sign is omega