voltage Flashcards
1
Q
what does a voltmeter measure?
A
the potential difference between 2 points in the circuit
2
Q
voltmeters have to be attached in?
A
parallel
3
Q
what 2 roles does the cell have within the circuit?
A
- drives the current around the circuit
- transfers energy to the components
4
Q
what is voltage?
A
the energy transferred per unit charge passed
5
Q
what is a volt?
A
a joule per coulomb
6
Q
formula for voltage?
A
energy / charge
7
Q
formula for voltage( with resistance) ?
A
voltage = current x resistance
