AQA A level Physics Electricity

What is electric current?

The rate of flow of charge

What is the formula for electric current?

I = Q/t

What causes current in metals?

The flow of electrons or negative charge carriers

What causes current in electrolytes?

The flow of charged ions

How do calculate the total charge transferred, using graphical methods?

Calculate the area under a current-time graph

How do calculate the current, using graphical methods?

Take the gradient of a charge-time graph

What is potential difference?

Electricrical work done per unit charge through the components of a circuit

What is the formula for p.d.?

V=W/Q

What is the energy transfer for p.d.?

Electrical energy to heat or light energy

What is electromotive force?

Electrical work per unit charge