Does Bulb Resistance Change with Different Current Levels?

In summary, the conversation discusses the relationship between voltage, current, and resistance in an electric bulb. The resistance of the bulb remains the same when it draws current less than the given value, and this can be explained by the equation V = IR. The concept of inrush current is also mentioned as a related topic.
  • #1
girishk14
1
0
Request answer for the below question:

"An Electric bulb draws 2.4 amphere at 12.0 volts. What is the resistance. What happens to the resistance of the same bulb when it draws current less than that of the given value?"


does the resistance decrease, increase or remain same? i was marked wrong for writing that it remains same. Please help
 
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  • #2
For the second part look up "inrush current"
 
  • #3
Are you familiar with the equation V = IR, where V is the voltage, I is the current, and R is the resistance? This is one of the most basic and used equations in electrical circuit theory.
 

Related to Does Bulb Resistance Change with Different Current Levels?

1. What is the resistance of an electric bulb?

The resistance of an electric bulb can vary depending on the type and wattage of the bulb. However, on average, the resistance of an electric bulb ranges from 100 to 1000 ohms.

2. How does the resistance of an electric bulb affect its brightness?

The resistance of an electric bulb is directly proportional to its brightness. This means that as the resistance increases, the brightness decreases. This is because a higher resistance restricts the flow of current, resulting in less energy being converted into light.

3. How does the resistance of an electric bulb affect its lifespan?

The resistance of an electric bulb plays a crucial role in determining its lifespan. A higher resistance means that the bulb is operating at a lower current, which can help prolong its lifespan. However, if the resistance is too high, it can cause the bulb to overheat and burn out quickly.

4. Can the resistance of an electric bulb be changed?

The resistance of an electric bulb is determined by its design and materials, so it cannot be changed. However, the overall resistance in a circuit can be adjusted by adding or removing resistors.

5. How can I calculate the resistance of an electric bulb?

The resistance of an electric bulb can be calculated by using Ohm's Law, which states that resistance is equal to voltage divided by current (R=V/I). You can measure the voltage and current of the bulb using a multimeter and then use the formula to calculate the resistance.

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