Question

In a parallel circuit, as light bulbs are added, does the voltage at the battery increase, decrease, or remain the same?

In a parallel circuit, as light bulbs are added, does the current at the battery increase, decrease, or remain the same?

How much power does a flashlight dissipate if it runs on two 1.5V batteries and has a bulb with a resistance of 15 ohms?

Answer 1

In parallel circuit, more bulbs you added in distinct branch, the total resistance will decrease

The battery will always supply the nominal voltage with small variations, so you can say in an ideal case, voltage does NOT change.

According to Ohm's law, the current will increase

The power P = V^2 / R = 3^2 / 15 = 0.6W