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How long wil 40w bulb glow in order to consume one unit of electricity?
Wiki User
∙ 10y ago
A 40 watt bulb uses 40 watt-hours in an hour, which is 0.04 kilowatt-hours, so it would take 25 hours to use 1 kilowatt-hour or 1 unit.
Wiki User
∙ 10y ago
Wiki User
∙ 11y ago1 unit
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Will the bulb light if the filament is broken Why?
No, the broken filament breaks the connection which electricity needs to complete the circuit.
IF a bulb travels at the speed of light and is turned on will it glow?
It could not travel at the speed of light. But hypothetically, it would glow.
How is light produced in an ordinary incandescent bulb?
Electric power is put trough a metallic filament inside a bulb that is filled with an inert gas. the filament is surrounded by the inert gas rather then air to stop the metallic filament from oxidizing when it starts to glow as a result of the electricity being run through it. the glowing filament produces the light.
What happens when a battery light the light bulb?
When the switch is turned it completes an electrical circuit. The circuit amperage flows through a high resistance filament in the bulb and it starts to glow. The bright glow from the filament and the reflector behind the bulb is what creates the flashlights beam.
You are using a bulb whose filament is broken will the bulb glow when connected to battery give reason?
no. it cant make its connection so it wont make any light.
Will the bulb light if the filament is broken Why?
No, the broken filament breaks the connection which electricity needs to complete the circuit.
What three objects make a light bulb glow?
A power source (of electricity), a means to transport this power (conductors/wires), and the light bulb itself
What is the principle of electric bulb in short?
Electricity through a thin wire (filament) makes it glow, which is prevented from burning through the wire by gas inside the bulb.
How does a battery powered light work?
The battery chemically stores electricity so when you 'switch on' the light then electricity flows from the battery to the bulb. The bulb the heats up to glow white and the reflector shines the light out of the battery powered light
What keeps the electricity in the light bulb When I was 4 years old I was And to this Day Way AHEAD of my time. My mom and dad thought this was a dumb question?
Electricity is not kept in a light bulb because there is nowhere to put it... It is not like a battery! Maybe, because they knew a light bulb can't keep any electricity, that is why your Mom and Dad thought your question was dumb? Well, it is not really all that dumb, it just had one word in it that was wrong. No question is dumb if it is asking asking how something works because that is always a good thing to do. That's the best way to learn about things! What we can say to answer your question is: Electricity is used up or consumed by a light bulb. The electricity it uses up makes it glow so brightly that it sends out light which we can see. When a light bulb is switched off it is said to go out, which just means it is not glowing any more. It can't glow when it is switched off because no electricity can get into it through the switch. That is why we say we have to switch on a light bulb, using a switch, to give it enough electricity to glow and give out light.
What happens when a bulb is attached to a battery?
When a bulb is attached to a battery or a cell as scientists call it, the bulb glows. If you want a bulb to glow more and more brighter, it depends on how many batteries you attached to the bulb. If you attach a lot of batteries at the same time, the bulb might even explode or burn out. The wires that hold the interaction between a light bulb and the battery is electricity. The electricity flows through the wires and touches the bulb and that is how a light bulb glows.
Based on what you have seen what must be true for a circuit to light a bulb?
There must be a current through the bulb in order for it to glow.
How do you make a bulb which glow on your clapping bulb?
you have to need IC 3 ,bulb
Why do bulb glow when you switch it on?
Because electricity flow through it's wire. Electricity came from outlets source. When you plugged in a device, electricity will flow into two ways. One is directed on a bulb and the other one is cut. Two points of cut wires are put in a switch so if you presses the switch, the other current (whether positive or negative) will generate full electricity that is capable of lighting a light bulb.
Is the glow that my TV has after I turn it off bad for the envionment?
No, just a residual glow. Does not consume power.
What is needed to light a light bulb?
Electricity has to pass through the filament which, when it gets hot enough from resistance to the current, begins to glow and give off light.
What causes incandescent light bulbs to produce light?
The filament in the bulb has a high resistance to the flow of electricity. As electricity passes through it, the filament heats up and begins to glow, giving off the visible light you see.
