More cards in this set

What is emf?

Why is emf never really equal to the total voltage (Sum of potential drops around the circuit)?

Give the power equation.

How is resistance defined?

Give Ohm's Law.

Resistance is the constant. So, what equation relates V, I and R?

Hence what shape will a V/I graph have and what is the gradient?

What name do we give to conductors that obey this?

R is proportional to a wire's (a) and inversely proportional to its (b)

Give the resistivity equation and work out its units.