Understanding the Voltage Across a Broken Lamp

In summary, the conversation discusses the voltage across a broken lamp and how it relates to the resistance and voltage of other components in the circuit. The suggestion is made to assume the broken lamp has infinite resistance, and it is confirmed that most of the voltage will be across the broken lamp.
  • #1
Icy98
17
1

Homework Statement


Why is the voltage across the broken lamp 12V?

Homework Equations


Can I assume the broken lamp is of infinite resistance?

The Attempt at a Solution


I understand the reading for the first voltmeter is 0V. But can anyone explain to me why the reading of the second voltmeter is 12V?[/B]
 
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  • #2
That would be a good way to look at it yes. How would the voltages then divide over the two light bulbs if there was a very small current present and the other intact light bulb has a much smaller resistance?
 
  • Like
Likes Icy98
  • #3
Most of the voltage will be across the broken one?
 
  • #4
Correct.
 
  • #5
Thank you![emoji3]
 

1. What is voltage?

Voltage, also known as electric potential difference, is the measure of the force that pushes electric charges through a circuit. It is measured in volts (V) and can be thought of as the pressure or energy that drives the flow of electric current.

2. Why is there no voltage across a broken lamp?

When a lamp is broken, it means that there is a break in the circuit and the flow of electric current is interrupted. Without a complete circuit, there is no path for the voltage to push the charges through, resulting in no voltage across the broken lamp.

3. Can voltage still be present in a broken lamp?

Yes, voltage can still be present in a broken lamp. This is because the voltage is generated by the power source and is still present in the circuit, even if the lamp is broken and not receiving any current.

4. What happens to the voltage when a lamp is broken?

When a lamp is broken, the voltage remains the same. However, since there is no complete circuit for the voltage to push the charges through, there is no current flowing and the lamp will not light up.

5. Is it dangerous to touch a broken lamp with voltage present?

Yes, it can be dangerous to touch a broken lamp with voltage present. This is because the voltage may still be present in the broken circuit and touching it could result in an electric shock. It is important to always exercise caution and seek professional help when dealing with electricity and broken circuits.

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