D.C./ COE

Question 1

Potential Difference

Answer 1

Potential Difference between 2 points is the energy trans

Question 2

Electromotive Force

Answer 2

Energy transferred per unit charge from some form into electrical energy when charge is moved around the circuit

Question 3

Resistance varies with temperature

Answer 3

As temperature rises, more charge carriers are released in the conductor, increasing the NUMBER DENSITY of charge carriers

Lattice ions vibrate with larger amplitude and this reduce the average drift speed of charge carriers

The effect of increase in number density pf charge carriers outweighs the effect of reduced drift speed.

Question 4

Current

Answer 4

Rate of flow of charges