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Why does a bulb not light if it is connected only to the positive point of the cell although electricity has passed through the filament?
Wiki User
∙ 13y ago
This is because electric current needs a complete circuit or path to flow through so the current will not have anywhere to go from the negative end of the cell in the scenario that you described.
Wiki User
∙ 13y ago
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How can you demonstrate that a light bulb emits electrons by thermionic emission?
Edison was said to have noted this emission when a wire paralleling a light bulb filament showed current flow if the filament was more negaive than the wire, but not if the filament was more positive than the wire. Note that the wire is not touching the filament. The wire was inside the bulb with the filament. First Edison lit the bulb with a simple battery circuit. Then the wire was connected to a current meter and other terminal of the current meter to a second battery and the other end of the second battery to either end of the first battery. Depending on which way the second battery is set, the ammeter indicates an electric current flowing through the wire or not.
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No electric charges may be positive or negative - electrons have a negative charge; ions have a positive charge.
What are small particles that have mass and positive electrical charge?
Electrons carry electricity within an atom.
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The "anode" is usually considered to be "negative". However in some experiments such as Gel Electrophoresis the anode is positive.
How is electricity produced in a flashlight?
When a flash light is switched on the circuit between the lamp and the batteries is complete. When the circuit is complete, the electrons flow from the positive terminal of the batteries through the tungsten filament back to the negative terminal of the batteries. Once the electricity flows through the filament it starts glowing producing a bright light. When the the torch light is switched off the circuit is broken and the flow of electricity is disrupted switching off the light.
Why does a bulb in a circuit not work?
A light bulb is not lit when the swtich is not connected to the wire becasue there is no flow of electricity, specifically, flow of electrons. By disconnecting the wire, the bulb is no longer connected to the electricity source.
When an ammeter is connected in a circuit which terminal of the battery must be connected to the positive terminal of the ammeter?
The positive terminal of the battery would be connected to the positive terminal of the ammeter. The load would then be connected between the two negative terminals, positive side of the load being connected to the negative side of the ammeter.
Does electricity travel negative to positive?
It is positive to negative.
Why are V-i characterstics different for tungsten and carbon lamp?
As carbon filament bulbs have a negative temperature coefficient and tungsten filament light bulbs have a positive temperature coefficient.
What will happen when a wire is connected to the positive end of a fresh battery if there is nothing else in the circuit?
Nothing will happen. There has to be a complete a circuit for the battery to function thus allowing for the flow of electricity.
Does it hurt to leave a gps in car charger connected to power while the gps is disconnected?
Not at all. When the GPS is connected the circuit is closed/complete. Once the unit is disconnected the circuit is open and electricity doesnt make a full pass from negative to positive.
Do magnets have electricity in them?
both magents and electricity have positive and negiteve charges
Does electricity travel from positive to negative or negative to positive in a circuit?
It goes negative to positive.
Which cable is positive and which is neg?
On a vehicle the red is positive (+) and the black is negative (-). If they are not color coded the cable connected to the starter is positive and the cable connected to the engine or chassis is negative.
What is the different between series and parallel connection?
In parallel connection all the positive terminals are connected with positive of the source and all the negative terminals are connected to negative of the source. Whereas in series connection one positive terminal is connected to the negative of another, like wise it goes on and finally the positive end is connected to the negative of the source.
What causes electricity short answer?
In nature there are two types of electricity positive and negative
