Electricity Flashcards
Amps =
Current
Coulomb =
Charge
Seconds =
Time
Volts =
Potential Difference
Ohms =
Resistance
Joule =
Energy
Watt is used in…
Power
Function of the fuse =
Stops the current from flowing by melting when it’s too high
Circuit breakers function =
Breaks the circuit when the current is too high
Function of insulation and double insulation =
To prevent people from getting a electrical shock
Eearth wire =
Provides a short pathway for electricty to get earthed when it gets into contact with a human
What does resistance cause:
Resistance causes transfer of electrical energy to heat energy
Power(W) equation =
Voltage(V) x Current (A)
Energy(J) equation =
Potential Difference (V) x Current (A) x Time (s)
What is A.C
Alternating Current: Current constantly changles direction. The usual main suply is of 230V (in the UK)
What id D.C
Direct Current: Current only flows in one direction, it is displayed as a single straight line. The usual main suply is 1.5V
Advantages of a parallel and series circuit
Parallel:
- Components (e.g. bulbs) may be switched on/off independently
- If one component breaks, current can still flow through the other parts
of the circuit
- Bulbs maintain a similar brightness
Series:
- Fewer wires, cheaper and easier to assemble.
- Uses less power
What is the relationship between Current and Voltage
As voltage increases, current increases
How does the amount of components affect the current
The more amount of components the lower the current
