Three bulbs, each with a resistance of 180 , are connected in parallel to an ideal battery of emf 60 V . Determine the current delivered by the battery when all the bulbs are switched on.

Step-by-step solution

Given the resistance of each bulb, R = 180 . Since three such bulbs are connected in parallel, the equivalent resistance R_ eq of the circuit is given by: 1 R_ eq = 1 R + 1 R + 1 R = 3 R R_ eq = R 3 = 180 3 = 60 The emf of the ideal battery is V = 60 V . According to Ohm's law, the total current I delivered by the battery is: I = V R_ eq = 60 60 = 1.0 A