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Why does electrical bulb used at home does not glow when connected to a dry cell?
Wiki User
∙ 10y ago
The key is your description of it as "bulb used at home". From that description, it's
understood to be a bulb designed to be installed in a socket in the bedroom, closet,
basement, etc., and powered by the mains voltage ... roughly 120 volts or 240 volts,
depending on what country it's used in.
The voltage between the terminals of the "dry cell" is about 1.5 volts.
The power dissipated by any passive device is proportional to the square of the voltage across its ends.
In the US or Canada, the power dissipated by the bulb would be (1.5/120)2 = 0.00016
of the power it's designed to use when glowing normally.
In many European or Asian countries, the power delivered to the bulb is (1.5/240)2 = 0.000039
of the power it's designed to use when glowing normally.
The filament in the bulb is not dissipating enough power to even get warm, and
certainly much too little power to "incandesce" or 'glow'.
In short, the voltage of the dry cell is only about 1.5 volts. That's the reason why
dry cells are seldom used to operate air conditioners and refrigerators, or to start
cars.
Wiki User
∙ 10y ago
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Can a tomato glow when connected to a light bulb?
no
Which bulb will glow at first when 3 bulbs are connected in series and switch is connected after 1 bulb?
All the three would glow at the same instant.
What 2 things do you need for a current to flow?
Potential difference and the conductor. A cell and a bulb. Some connecting wires. The bulb can be made glow by connecting the wires with the cell.
Three different bulbs are connected in series when switch is closed the last bulb does not glow why?
because the switch is closed
Is a dark light bulb starting to glow a conversion from chemical energy to mechanical?
No... Electrical to heat (mainly) and light.
Can a tomato glow when connected to a light bulb?
no
Which bulb will glow at first when 3 bulbs are connected in series and switch is connected after 1 bulb?
All the three would glow at the same instant.
Why do bulbs have two terminals?
One Terminal Is for Positive And Another Is Negative Wier . Bulb Can't Glow Until Both The Terminals Are Connected
Why in an electrical lab a bulb connected to supply goes off slowly when the main supply is switched off?
the electrons in the wire connected to the bulb take a while to fade away completely as the main energy source is turned off, causing the bulb to glow faintly until all of the electricity is out of the system
What happens when a bulb ammeter battery and switch are put connected together?
the bulb will glow and ammeter will show the reading
Connected in series or parallel will each bulb glow brighter?
In parallel, each bulb will have full voltage applied across them. However, in series, the voltage across each bulb won't be the same as supply voltage. Thereby, bulbs connected in parallel will glow brighter.
Why does a fused bulb not glow?
A fused bulb does not glow because the filament of a fused bulb is broken. Since current can't flow through the filament, it can't get hot enough to glow.
When one terminal of the cell is joined by copper wire to the one terminal of bulband another terminal of cell with aluminium wire to the other terminal of bulb. Will the bulb glow Give reason for yo?
Both copper and aluminium wire will conduct electricity, so the bulb will glow. Aluminium is less efficient at conducting than copper. Copper-clad aluminium wire is electrical wire coated with a thin layer of copper.
Did the light bulb light up when the dry cells were connected in parallel?
If dry cells are connected in parallel, they will supply more current to the bulb, which will cause it to glow for a longer period of time, but at the same brightness as if only a single cell were used. When the cells are connected in series, the voltage is increased, which will cause the bulb to burn more brightly. If the voltage is increased past the safe point for the bulb, its life will be shortened and it may burn out rapidly. In series, the voltages add. In parallel, you essentially have a larger cell of the same type (cell as in battery of one).
How do you make a bulb glow with one wire?
This is usually done by passing an electrical current through the wire.
What 2 things do you need for a current to flow?
Potential difference and the conductor. A cell and a bulb. Some connecting wires. The bulb can be made glow by connecting the wires with the cell.
Three different bulbs are connected in series when switch is closed the last bulb does not glow why?
because the switch is closed
