Module 4 - 4.2.2 E.m.f. and P.d.

Question 1

Electromotive Force (Definition)

Answer 1

E.m.f is the energy per unit charge being transferred from another form into electrical energy

Question 2

Electromotive Force (Energy)

Answer 2

Components provide energy that pushes the current around a circuit

Question 3

Potential Difference (Definition)

Answer 3

P.d. is the energy per unit charge being transferred from electrical energy into another form

Question 4

Potential Difference (Energy)

Answer 4

Components have work done to them by the current

Question 5

When an electron is accelerated by a voltage

Answer 5

it gains energy equal to eV (= 1/2 mv^2)

Question 6

Series: Potential Difference

Answer 6

Splits over each component

Question 7

Parallel: Potential Difference

Answer 7

Same across each branch

Question 8

Resistance of voltmeters

Answer 8

very large so only a small current will go through it