# Current and Charge (Random questions)

What is the unit of charge?
Coulomb
1 of 21
In a fluid or liquid, the charge carriers are...
positive and negative ions
2 of 21
What do you apply to insulators to add or removes charges?
Friction
3 of 21
What is the definition of current?
Current is the rate of flow of charge
4 of 21
Current of 1A is equal to...
1C passing a single point in 1s
5 of 21
What is the equation for charge?
Charge = Current x Time (Q = I x t)
6 of 21
Which way do the electrons flow in conventional current?
Positive to Negative
7 of 21
How do electrons move? (Not in conventional current)
Negative to Positive
8 of 21
What is the definition of potential difference?
Potential difference is the work done per unit of charge
9 of 21
What is the equation for potential difference?
Potential difference = work done / charge (p.d. = wd / charge)
10 of 21
What is the definition of E.M.F? (Electro Motive Force)
The electrical energy produce per unit charge passing a source
11 of 21
What is the equation for E.M.F?
Work done = Charge x E.M.F
12 of 21
What is the equation for power?
Power = Work done / Time (P = wd / t)
13 of 21
What is the equation for power in regards to E.M.F?
Power = Current x Voltage (P = I x V)
14 of 21
What is the charge of an electron?
1.6 x 10^-19
15 of 21
What is the length of one micrometre?
1 x 10^-6
16 of 21
What is the equation for resistance?
Resistance = Voltage / Current (R = V / I)
17 of 21
What are the units of resistance?
Ohms
18 of 21
What is the equation for resistance in a wire?
Resistance = Resistivty x length / The wire's cross-sectional area (R = pl / A)
19 of 21
Free electrons are only found in...
metals
20 of 21
What are the units of current?
Amperes
21 of 21

## Other cards in this set

### Card 2

#### Front

In a fluid or liquid, the charge carriers are...

#### Back

positive and negative ions

### Card 3

#### Front

What do you apply to insulators to add or removes charges?

### Card 4

#### Front

What is the definition of current?

### Card 5

#### Front

Current of 1A is equal to...