2.2.2 E.M.F. and P.D.

Question 1

Define Terminal P.D.

Answer 1

PD measured across terminals of a cell or battery. Equal to the EMF if no current is being drawn.

Question 2

Define the Volt.

Answer 2

PD between 2 points in a circuit in which 1 joule of electrical energy is transferred to other forms when 1C charge flows between them. 1JC^-1

Question 3

Define E.M.F.

Answer 3

Potential energy gained by a unit charge passing through a cell or battery. Equal to voltage across it when not current is being drawn.

Question 4

State Kirchhoff’s 2nd Law.

Answer 4

In any given loop in a circuit the sum of the EMFs is equal to the sum of the PDs as a consequence of the conservation of energy law.

Question 5

Define Potential Difference.

Answer 5

Amount of electrical energy transferred to other energy forms per coulomb of charge flowing between them.