To determine the brightness of the bulbs after adding a second bulb in series with the first bulb, we need to understand how bulbs behave in a series circuit.
In a series circuit, the same current flows through each component, and adding another bulb increases the total resistance of the circuit. This results in a decrease in current flowing through all components.
Here's an analysis of the options:
A) Each bulb will be as bright as the first bulb was.
- This is incorrect because adding a second bulb increases the resistance and decreases the current, making both bulbs dimmer.
B) The first bulb will be the same brightness, and the second bulb will be dimmer.
- This is incorrect because both bulbs experience the same current, and the addition of the second bulb reduces the overall current.
C) Each bulb will be dimmer than the first bulb was.
- This is correct because both bulbs share the same current, and the additional resistance from the second bulb decreases the overall current, leading to lower brightness for each.
D) The first bulb will be dimmer than it was, and the second bulb will not light.
- This is incorrect because both bulbs will light, but they will be dimmer due to the reduced current.
Thus, the correct answer is:
C) Each bulb will be dimmer than the first bulb was.
1 answer