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Why does a wire connected to a bulb not glow where as the filament of the bulb glows when the same current is passed through both connections?
It glows because the filament wire is exposed in a vacuum and electrically, the light is a high resistance load. You know the sparks you get when you rub two exposed hot electrical wires together? That's a dead short. Now, put that short in a vacuum where the wire can't oxidize, and presto! Incandescent light. The filament is made of tungsten, and tungsten has a very, very, very high melting point. It took Thomas Edison a long time to find it, but find it he did.
What else can I help you with?
What is an incandascent lamp?
Your standard light bulb where a filament is heated by a current passing through it. The heated filament then gives off light.
Will bulbs be easier to operate when the higher the input current?
Higher input current means higher voltage. A bulb contains one filament (tungsten) when input power supply passing through this filament, the filament gets hot and makes a red color and then yellow. This filament needs only electrons flow, but if we are operating higher current bulb efficiency will down, when the filament burns out.
When the VOM is to be used as ammeter how should this be connected?
When using a voltmeter (VOM) as an ammeter, it must be connected in series with the circuit. This is because an ammeter measures the current flowing through the circuit, which requires all the current to pass through the device. Additionally, ensure that the voltmeter is set to the appropriate current range to avoid damaging the device. Always take precautions to ensure the circuit is de-energized before making connections.
What is x-ray tube voltage?
X-Ray voltage means voltage which is applied across anode & cathode, this is of very high voltage (in KV). This causes a high electric field for the moving of electrons emitted from cathode to anode. One more voltage wrt X-ray tube is filament voltage. Filament voltage with some appropriate current is applied to filament for the emitting of electrons. This current is proportional to the intensity of X-ray radiation generated from the tube. More current through the filament causes permanent damage of filament.
What happens to the current of R1 connected in series with R2 when it is also connected in parallel with R3?
The current, if connected to a voltage source that can supply the needed current to (R1+R2) R3, will be unchanged. If the source cannot supply the needed current, the terminal voltage will decrease, which will change the current flowing through R1 and R2.
Two lamps one with thick filament and one with a thin filament are connected in parallel to a battery . What explains why the lamp with the thicker filament burns more brightly?
The lamp with the thicker filament has a lower resistance compared to the one with the thin filament. According to Ohm's law, lower resistance allows more current to flow through the thicker filament when connected in parallel to the same voltage source. This increased current results in a higher power output (P = I²R), causing the lamp with the thicker filament to burn more brightly.
Why does the resistance of a filament depend on the current?
The resistance of a filament depends on the current flowing through it because as current flows through the filament, it heats up due to the electrical energy converting into heat energy. This increase in temperature causes the resistance of the filament to increase, resulting in a higher overall resistance in the circuit.
What happened to the bulb when the wires are connected to charged parts of the battery?
When the wires are connected to the charged parts of the battery, an electric current flows through the circuit, causing the bulb to light up. The flow of electricity energizes the filament inside the bulb, which heats up and produces light. If the connections are secure and the battery is charged, the bulb will shine brightly until the battery's energy is depleted.
What heats the filament?
The electric current passing through the filament in an incandescent light bulb heats it up. This causes the filament to glow and produce visible light.
Can current flow through a bulb with a broken filament?
No, the broken filament breaks the connection which electricity needs to complete the circuit.
What electrical current flows through the metal filament of a light build electrical energy is converted to?
The electrical current that flows through the metal filament of a light bulb is in the form of electrons. As the electrons pass through the filament, they encounter resistance, which causes the filament to heat up and emit light. This process converts electrical energy into light and heat energy.
You are using a bulb whose filament is broken will the bulb glow when connected to battery give reason?
No, the bulb will not glow when connected to a battery if the filament is broken. The filament is the part of the bulb that heats up and produces light when electricity passes through it. If the filament is broken, there is no path for the electricity to flow through and generate light.
What is electrical energy converted into when electric current flows through the metal filament of a light bulb?
Electrical energy is converted into light and heat when electric current flows through the metal filament of a light bulb.
What 2 parts of the light bulb need to be connected in order for it to light?
In order for a light bulb to light up, the filament and the base need to be connected. The filament is the part that emits light when electricity passes through it, and the base is where the electrical contacts are made to supply power to the filament.
What is an incandascent lamp?
Your standard light bulb where a filament is heated by a current passing through it. The heated filament then gives off light.
Construction and working of electric bulb?
initially when current pass through the filament
Is a filament of a light bulb glows when an electric current flows through it is a chemical change?
It is a physical change brought about by the exitation of molecules producing heat and light. A general rule of thumb is that a physical change can be repeated on an article and chemical change cannot. Remove the current from a filament and it is still a filament.
