question_answer 4)

(a) Three resistors 2, 4 and 5 are combined in parallel. What is the total resistance of the combination?                 (b) If the combination is connected to a battery of e.m.f. 20 V and negligible internal resistance, determine the current through each resistor, and the total current drawn from the battery.  

Answer:

(a) Using  we get                                 or                      (b) Using, V = IR, we get                   i.e.                   Current through 2 resistor                                 Current through 4  resistor                                 Current through 5  resistor