1 What is the relation between the main current which flows from the source and the current in each resistor in series ?

The current is same for each resistor in series

2 What is the relation between the potential difference across the source and the potential differences across each resistor in series ? Which resistor has the highest pd across it ?

potential difference will divide for each resistor in series

the highest pd highest. .. which has lees are

3- A potential difference of 12 V is found to produce a current of 0.40 A in a 3.2 cm length of wire with a uniform radius of 0.40 cm what is the resistance and resistively of wire ?R= V/I

= 12 / 0.40 = 30 Ω

4 A 3Ω resistor a 6 Ω resistor and 9 Ω resistor are connected in series with a 12 V battery .

Draw a circuit diagram . What are A ) the equivalent resistance

b) the current in each resistor

c ) the pd across each resistor

A) R = R1 + R2 + R3

18 Ω

B ) I = V/R = 18/12 =1.5 A

C ) V= IR

= 1.5 X 18 == 27