Voltage , Current and Resistance Flashcards
1
Q
What is current ?
A
The flow of electrons
Measured in amps( usually MA) using an ammeter
2
Q
What is voltage ?
A
This is the electrical energy that the electrons carry ( they get energy from the battery )
Measured in volts
3
Q
What is resistance ?
A
Something which tries to stop the flow of current
Greater the resistance , smaller the current
Measured in ohms
4
Q
What is the equation for voltage ?
A
Voltage = current x resistance
5
Q
What is the equation for resistance
A
R = voltage / current
6
Q
What is the equation for current ?
A
Voltage / resistance