Electric circuits Flashcards
1
Q
Current in a series circuit
A
Current at every point is the same
2
Q
Calculation of resistance in a series circuit
A
Sum of resistance at each resistor
3
Q
Relation between p.d.s and p.d in a series circuit
A
Sum of p.d.s = Sum of p.d
4
Q
Current in parallel cirucit
A
Current from the source is larger than the current in each branch
5
Q
What is the current from the source in parallel circuits
A
The sum of currents in separate branches of a parallel
6
Q
Calculation of resistance in a parallel circuit
A
1/RSUM = (1/R1 + 1/R2 + … + 1/Rn).
7
Q
Advantages of a parallel circuit
A
- Brighter than series circuit
- If one loop is broken, the other loop is remained powered
8
Q
Equation for power
A
Power = current x volts
P = IV
9
Q
Equation for energy
A
Energy = current x volts x time
E = IVt
10
Q
State electrical hazards
A
- Damaged insulation
- Overheating of cables
- Damp conditions
11
Q
What does a fuse do
A
A fuse protects a circuit by stopping the flow of electricity
