Current Flashcards
1
Q
Formula for Current (A)
A
Current (A) = Charge (C) / Time (S)
2
Q
Unit for Current
A
Ampere
3
Q
Current is caused by
A
Flow of electrons
4
Q
Tool for measuring current
A
Ammeter
5
Q
What does EMF stand for
A
Electromotive force
6
Q
What is EMF
A
The maximum voltage a cell can produce, measured in volts
7
Q
Voltage or Potential Difference is measured in
A
Volts
8
Q
What is voltage
A
The energy the cell gives the electrons it pushes out
9
Q
How to measure voltage
A
with voltmeter (connected in parallel)
10
Q
Formula for Voltage
A
Voltage = Energy/Charge
11
Q
Resistance is measured in
A
Ohm
12
Q
Formula for Resistance
A
Resistance = Voltage/Current
13
Q
Factors affecting resistance
A
- Resistance is proportional to length
- Resistance is inversely proportional to cross-sectional area
14
Q
Formula for electrical power
A
Voltage X Current
15
Q
Formula for electrical energy
A
Voltage X Current X Time
