Question

Three resistors are connected to a 12 V battery as shown in the figure given below:

(i) What is the current through the 8 ohm resistor ? 

(ii) What is the potential difference across the parallel combination of 6 ohm and 12 ohm resistor ? 

(iii) What is the current through the 6 ohm resistor ?

Answer 1

Let 12Ω and 6Ω resistors are in parallel

∴ Their effective resistance = 

Total resistance of the circuit = 8 + 4 = 12Ω

(i) Current drawn =

 

(ii) P.D across 8Ω resistor = 1A.

   P.D across the parallel combinaion of resistors = 12-8 =4V

∵ The resistances are in parallel they have the same P.D each i,e., 4V.

(iii) Current through the 6Ω resistor =