4.0 Introduction to circuits Flashcards
1
Q
Charge def
A
A property of a body which experiences a force in an electric field
2
Q
Charge symbol
A
Q
3
Q
Charge units
A
coulombs (C)
4
Q
Current def
A
A measure of the flow of electrons around a circuit
5
Q
In which way does direct current flow
A
from positive to negative
6
Q
Current symbol
A
I (i)
7
Q
Current units
A
Amperes or Amps (A)
8
Q
Potential difference def
A
The force driving the flow of electrons
9
Q
Potential difference symbol
A
V
10
Q
Potential difference units
A
Volts (V)
11
Q
Resistance def
A
Everything that resists or opposes the flow of electrons
12
Q
Resistance symbol
A
R
13
Q
Resistance units
A
Ohms (Ω)
14
Q
What does a wire do
A
Connects components and passes current easily from one part of a circuit to another
15
Q
What does a cell do
A
Pushes electrons around a complete circuit
