Does a Light Bulb's Current and Voltage Follow Ohm's Law?

In summary, the conversation discusses whether a light bulb's current and voltage would change according to Ohm's Law. The participants also mention the need for the bulb to be ohmic and the effect of random thermal motion on electron current motion. They also mention the variation of resistance as a function of temperature. However, the original question is not answered due to posting guidelines prohibiting giving answers to textbook questions without the OP showing effort.
  • #1
gr3g1
71
0
Hi guys..

Would a light bulb's current and voltage change according to ohm's law?
Thanks..
 
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  • #2
What do you think?

For the light bulb (assume it's an incandescent bulb) to be ohmic, what can you say about a specific property of the bulb?
 
  • #3
Hint: random thermal motion may affect electron current motion...
 
  • #4
it will work by ohm law, but R is not a constant in such equation, the resistance changes as a function of the temperture.
 
  • #5
Tuvia, this is clearly a standard textbook question, and our posting guidelines clearly forbids writing out answers to such questions, especially if the OP has not shown any original effort.

Do you think the two posters above you didn't venture an answer because they don't know?
 

1. What is Ohm's law?

Ohm's law is a fundamental principle in physics that explains the relationship between voltage, current, and resistance in an electrical circuit. It states that the current flowing through a conductor is directly proportional to the voltage applied and inversely proportional to the resistance of the conductor.

2. How does a light bulb relate to Ohm's law?

A light bulb is a type of electrical load that obeys Ohm's law. When a voltage is applied to a light bulb, the current flowing through it will change accordingly. As the resistance of the light bulb increases, the current decreases, and vice versa.

3. Can Ohm's law be applied to all types of light bulbs?

Yes, Ohm's law can be applied to all types of light bulbs, including incandescent, fluorescent, and LED bulbs. However, the resistance of each type of bulb may vary, so the current and voltage relationship may differ.

4. How does the resistance of a light bulb affect its brightness?

The resistance of a light bulb is directly related to its brightness. As the resistance increases, the current decreases, resulting in a dimmer bulb. Conversely, as the resistance decreases, the current increases, resulting in a brighter bulb.

5. What happens if the voltage applied to a light bulb exceeds its rated voltage?

If the voltage applied to a light bulb exceeds its rated voltage, the current flowing through the bulb will also increase, potentially causing the bulb to overheat and burn out. It is important to use light bulbs with the correct rated voltage to prevent damage and ensure safety.

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