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A light bulb has a resistance of 240 \\Omega. It is connected to a standard wall socket (120 \\mathrm…
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Answer. Answer: The current is 0.5 amperes.Question 8 Answer: Electrical energy in a light bulb is transformed into light energy and thermal energy (heat). Evidence for light energy is supported by the fact that the light bulb gives off light visually.
When a light bulb is turned on electrical energy is transformed into two other types of energy what are they and support your Answer with evidence?
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Question 8 Answer: Electrical energy in a light bulb is transformed into light energy and thermal energy (heat). Evidence for light energy is supported by the fact that the light bulb gives off light visually.
When you turn on a light bulb electricity is transferred into what type of energy?
When you turn on a light bulb, electrical energy is transformed into thermal and light energy as electrons flow through the filament of the bulb. Energy can’t be created nor destroyed; it can only be transformed from one form to another.
How does a light bulb convert electrical energy to light energy?
Incandescent light bulbs are devices that convert electricity into light by heating a filament, using electric current, until it emits electromagnetic radiation. As current passes through the filament, its high resistance causes its temperature to rise until it glows.
What is an example of electrical energy being converted or changed into light energy?
Light bulbs convert electrical energy into light energy.
Which two forms of energy we receive from an electric bulb?
An electric bulb uses electrical energy and transforms it mainly into light and heat energy. 5.
What do the power ratings on lightbulbs measure?
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Lightbulb wattage measures the amount of energy a lightbulb uses every hour. Therefore, a higher wattage lightbulb requires more electricity. However, lightbulb wattage doesn’t necessarily correlate with brightness.
What does the power of a light bulb measure?
In lighting the work is measured in lumens. The electrical energy is measured in watts. So to determine the efficiency of a light bulb, you need to know two things. One is the amount of light that the light bulb puts out, and the other is the amount of electricity it consumes to produce that much light.
What do the ratings on light bulbs mean?
The best bulbs are those in class A, the least good in class G. In other words: A-class bulbs are the most efficient because they use less energy than the others to supply the same amount of light. Typically, light bulbs are devided into categories (1): Compact fluorescent light bulbs are in category A or B.
What does 60W mean on a light bulb?
Energy by the Hour
Previously we used the example of a 60W light bulb. Its 60W rating means that for each second that it’s on it uses 60 joules of energy. Over the course of 60 minutes, or 3,600 seconds, this means it would use 216,600 joules of energy.
Are 60 watt bulbs brighter than 40 watt?
For a traditional incandescent bulb, this also means a difference in lumens; the higher wattage will yield more light. A conventional incandescent 40-watt bulb produces around 450 lumens of light, while a traditional incandescent 60-watt bulb produces about 800 lumens.
What is the current in a circuit in which a 75 W load is connected to a 120 V supply?
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Explanation: current= watts divided by voltage= 75/120= 0.625 amperes.
What is the resistance of an ordinary battery 60w 120v light bulb when it is on?
The resistance of a 60 watt light bulb designed to operate at 120 volts is 240 Ω. Hence, the resistance of a 60 watt light bulb designed to operate at 120 volts is 240 Ω.
What is the resistance of a 100w lightbulb as it is attached to a 120v outlet?
For example, a 100 watt light bulb operating on 120 volts AC will have 144 ohms of resistance and will draw 0.833 Amps.
What is the resistance of a 60 W bulb?
The filament in a 60 watt bulb has a resistance of 240 ohms as compared to 145 ohms for a 100 watt bulb.
What happens to the brightness of bulb a?
Explanation of Solution
The brightness of the bulb depends on the amount of current flowing through it. When the current is increased, the brightness would also increase. Conclusion: Brightness of light emitted by the bulb increases when current increases.
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a light bulb has a resistance of 240
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