Electricity

Question 1

Electric current

Answer 1

The flow of charge carriers

Question 2

Potential Difference

Answer 2

Energy transfered per unit charge

Question 3

Power

Answer 3

work done per unit time

Question 4

Resistance

Answer 4

The ratio of the voltage across the component and current flwoing through it

Question 5

Ohm’s law

Answer 5

A conductor obeys the law if the current in it is directly proportional to the p.d across it.

Question 6

E.M.F

Answer 6

Energy transfered per unit charge in driving charge around the whole circuit

Question 7

Distinguish between emf and pd

Answer 7

P.D is when electrical energy is being converted into other forms of energy. E.M.F is when one other forms of energy is being converted into electrical energy
P. D is energy for part of the circuit while E.M.F is energy for the whole circuit

Question 8

Kirchoff’s 1st law

Answer 8

The sums of the current entering the junction is =to the sum of the current leaving the junction

Question 9

Conservation of charge

Answer 9

Charge cannot be created or destroyed but only transffered from one point to another