Potential Difference and EMF Flashcards
1
Q
What is the potential difference?
A
The work done by the charges passing through a device per coulomb
2
Q
What is the equation for voltage using energy and charge?
A
V = E/Q
3
Q
What does EMF stand for and what is it?
A
It is Electromotive Force and is the work done by the source per coulomb.
4
Q
What is the charge of a component with energy 600mJ and voltage 3V?
A
0.2C
5
Q
A gas containing doubly charged ions flows to give an electric current of 0.64A. How many ions pass a point in 1 minute?
A
1.2x10*20
6
Q
20 million electrons per second flow through a circuit. Calculate the current in the circuit.
A
3.2x10*-12
