Topic 2 - Charge, Voltage and Energy Change Flashcards
1
Q
what is the formula for charge?
A
charge = current x time
2
Q
what is current?
A
the rate of flow of electrical charge around a circuit
3
Q
what is charge measure in?
A
coulombs, C
4
Q
what happens when an electrical charge goes through a change in voltage?
A
energy is transferred
5
Q
where is the energy supplied to the charge?
A
at the power source
6
Q
where does charge give up energy?
A
when it passes through components elsewhere in the circuit
7
Q
what is the definition of voltage?
A
energy transferred per unit charge passes
8
Q
what is the definition of a volt?
A
one joule per coulomb
9
Q
what is the formula for energy transferred?
A
energy transferred = charge x voltage or energy transferred = charge x current x resistance
