6.2.1 DC Electricity Flashcards
1
Q
What is the role of a cell in a circuit?
A
Provide emf/energy to the charge in the circuit
2
Q
What is required for a current to flow?
A
A complete circuit
A potential difference
3
Q
What is the quantity symbol for charge?
A
Q
4
Q
What is the unit and unit symbol for charge?
A
Coulombs (C)
5
Q
What is the equation relating charge, current and time?
A
Charge = current x time
6
Q
What is the quantity symbol for current?
A
I (capital i)
7
Q
What is the unit and unit symbol for current?
A
Amperes or Amps (A)
8
Q
What can you say about the current anywhere in a single closed loop (circuit)?
A
It is the same everywhere.
9
Q
What is quantity symbol for resistance?
A
R
10
Q
What is the unit and unit symbol for resistance?
A
Ohms (Ω)
11
Q
What is the equation for resistance?
A
Resistance = Voltage / current
