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What switch type and rating is required to control five 300 Watt tungsten filament lamps on a 120 volt circuit Show calculations?
For a tungsten filament lamp rated at 300 Watts on 120V, the current can be calculated using the formula: Power = Voltage x Current. Thus, Current = Power / Voltage = 300W / 120V = 2.5A. To control five 300W tungsten filament lamps, you'd need a switch rated for at least 2.5A at 120V, preferably with a safety margin for additional load or inrush current. A switch with a rating of 10A at 120V would provide a suitable capacity for this circuit.
What else can I help you with?
Why is a copper wire not used to make filaments of electric bulbs?
Because the filament is in effect a resistor. Copper is too good a conductor to provide resistance to the current, and would simply allow the current to complete the circuit. The light is generated by the filament glowing as it heats up in resistance to the current. Tungsten is a much better resistor.
Does a light fitting still use electricity if it's on but the bulb has blown?
No. The filament completes the circuit, so if the filament is blown the circuit is incomplete, so no electricity flows.
Will the bulb light if the filament is broken Why?
No, the bulb will not light if the filament is broken because the filament is the part of the bulb that creates light when electricity passes through it. Without a functioning filament, there is no source of light in the bulb.
Why does a light bulb filament act as resistor?
The filament of a light bulb isn't like a resistor ... it is a resistor. The only difference from the ones on circuit boards is the it's designed to operate at a much higher temperature. So hot that it glows. The glass envelope is there to prevent oxygen from getting in and promptly burning it. When the filament becomes too hot it breaks breaking the current that was lighting it in the first place. That is why the light bulb "burns" out.
What are some of the components in a light bulb?
A light bulb typically consists of a filament, which produces the light when electricity passes through it, and a glass bulb enclosing the filament to protect it from damage and to contain the inert gas (such as argon or nitrogen) that helps prevent the filament from burning. The bulb also has a base that connects the light bulb to the electrical circuit.
Sentence with filament?
Filament was made from plastic. The filament was very stable and smooth.
What materials are used in the construction of a light bulb?
A light bulb is typically made of a glass bulb, a tungsten filament, and a metal base. The glass bulb encloses the filament and is filled with an inert gas like argon or nitrogen. The filament is made of tungsten, a metal known for its high melting point and durability. The metal base is used to connect the bulb to an electrical circuit.
What elements are used in light bulbs?
Any noble gas except helium, or beryllium used in WWII is now dangerous or tungsten, copper, zinc, nickel, fluorine, mercury, titanium, and carbon Tungsten Filament is used in Incandescent Lamps and Fluorescent Lamps Tungsten and Argon are used in incandescent light bulbs. Tungsten (chemical symbol 'W', 74)
Why does the light bulb not work when the filament is broken?
A light bulb works by passing an electric current through the filament, which is usually made from a high resistance substance such as tungsten. When the current flows through, the filament glows which produces the light. When it burns out, no electricity passes and no glowing occurs. Source: i just know
Why does a light bulb light in a closed circuit?
A bulb does not light up if there is no voltage available across the bulb, or if the bulb is burned out.
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.
If the filament of the bulb is broken would the circuit is complete?
no, the circuit won't complete
What causes a light bulb to turn black when they burn out?
As an incandescent light bulb is used, tungsten slowly evaporates from the filament causing it to get thinner. When it gets too thin it can no longer carry the current and part of it melts causing the bulb to blow out.
Why is a copper wire not used to make filaments of electric bulbs?
Because the filament is in effect a resistor. Copper is too good a conductor to provide resistance to the current, and would simply allow the current to complete the circuit. The light is generated by the filament glowing as it heats up in resistance to the current. Tungsten is a much better resistor.
What does a filament lamp do in a circuit?
A filament lamp produces light by converting electrical energy into heat and then light. It acts as a resistive load in the circuit, meaning it resists the flow of current and causes the filament to glow and produce light.
Does a light fitting still use electricity if it's on but the bulb has blown?
No. The filament completes the circuit, so if the filament is blown the circuit is incomplete, so no electricity flows.
Will the bulb light if the filament is broken Why?
No, the bulb will not light if the filament is broken because the filament is the part of the bulb that creates light when electricity passes through it. Without a functioning filament, there is no source of light in the bulb.
