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Questions and Answers
What is the function of the filament in a light bulb?
What is the function of the filament in a light bulb?
- To connect the bulb to the electrical source.
- To heat up and produce light when electricity passes through it. (correct)
- To provide a protective casing for the bulb.
- To contain the inert gas within the bulb.
Which part of the light bulb serves to connect the filament to the power supply?
Which part of the light bulb serves to connect the filament to the power supply?
- Electrical contacts (correct)
- Inert gas
- Glass support
- Brass cap
What is the role of the inert gas inside a light bulb?
What is the role of the inert gas inside a light bulb?
- To enhance the brightness of the light produced.
- To conduct electricity.
- To cool down the light bulb gradually.
- To prevent the filament from oxidizing and extending its lifespan. (correct)
Which component acts as a housing for the filament in a light bulb?
Which component acts as a housing for the filament in a light bulb?
What is the primary material of the brass cap in a light bulb?
What is the primary material of the brass cap in a light bulb?
What is the main material used for the filament in an incandescent bulb?
What is the main material used for the filament in an incandescent bulb?
Which of the following parts supports the tungsten filament and holds it in place?
Which of the following parts supports the tungsten filament and holds it in place?
What role does the glass envelope play in an incandescent bulb?
What role does the glass envelope play in an incandescent bulb?
What is unique about the gases used in an incandescent bulb?
What is unique about the gases used in an incandescent bulb?
What part of the incandescent bulb connects to the lamp's electrical contacts?
What part of the incandescent bulb connects to the lamp's electrical contacts?
Who demonstrated electric lamps in Newcastle, England, in 1878?
Who demonstrated electric lamps in Newcastle, England, in 1878?
What significant discovery did Thomas Edison make in 1879 regarding light bulbs?
What significant discovery did Thomas Edison make in 1879 regarding light bulbs?
Which inventor patented an improved carbon filament in 1881?
Which inventor patented an improved carbon filament in 1881?
What advancement did Willis R. Whitney achieve in 1903?
What advancement did Willis R. Whitney achieve in 1903?
What did Edison's bulb eventually achieve in terms of duration?
What did Edison's bulb eventually achieve in terms of duration?
What is the primary function of the coiled tungsten filament in a light bulb?
What is the primary function of the coiled tungsten filament in a light bulb?
Which component of the light bulb is responsible for connecting the filament to the source of electricity?
Which component of the light bulb is responsible for connecting the filament to the source of electricity?
What is the purpose of the mixture of inert gases inside a light bulb?
What is the purpose of the mixture of inert gases inside a light bulb?
Where is the screw cap located in relation to other components of the light bulb?
Where is the screw cap located in relation to other components of the light bulb?
Which component helps secure the filament in its position within the bulb?
Which component helps secure the filament in its position within the bulb?
Which element is NOT used in the manufacturing of incandescent lamps?
Which element is NOT used in the manufacturing of incandescent lamps?
What classification do large incandescent lamps fall under?
What classification do large incandescent lamps fall under?
Which gas is commonly used in incandescent lamps to prevent oxidation?
Which gas is commonly used in incandescent lamps to prevent oxidation?
Which component contributes to the actual light-emitting part of an incandescent lamp?
Which component contributes to the actual light-emitting part of an incandescent lamp?
Which of the following materials is used as insulation in incandescent lamps?
Which of the following materials is used as insulation in incandescent lamps?
Who is credited with inventing the first incandescent electric light?
Who is credited with inventing the first incandescent electric light?
What significant improvement did Lewis Howard Latimer make to the incandescent light bulb?
What significant improvement did Lewis Howard Latimer make to the incandescent light bulb?
What year did Thomas Edison discover a carbon filament that glowed for 40 hours?
What year did Thomas Edison discover a carbon filament that glowed for 40 hours?
Which scientist demonstrated a practical electric lamp in Newcastle, England?
Which scientist demonstrated a practical electric lamp in Newcastle, England?
What milestone did Edison's carbon filament bulb achieve?
What milestone did Edison's carbon filament bulb achieve?
Which element is primarily responsible for the filament in incandescent lamps?
Which element is primarily responsible for the filament in incandescent lamps?
What is the purpose of the argon gas in incandescent lamps?
What is the purpose of the argon gas in incandescent lamps?
Which of the following is NOT commonly used in manufacturing incandescent lamps?
Which of the following is NOT commonly used in manufacturing incandescent lamps?
Which component is used to prevent the filament from coming into contact with the glass?
Which component is used to prevent the filament from coming into contact with the glass?
What role does the inert gas play in incandescent lamps?
What role does the inert gas play in incandescent lamps?
Which type of lamp is commonly associated with simulating daylight?
Which type of lamp is commonly associated with simulating daylight?
In which application are miniature lamps typically utilized?
In which application are miniature lamps typically utilized?
What characterizes PAR 38 Lamps among the listed options?
What characterizes PAR 38 Lamps among the listed options?
Which lamp type is best suited for applications that require additional durability?
Which lamp type is best suited for applications that require additional durability?
Which of the following types of lamps is primarily used for heating purposes?
Which of the following types of lamps is primarily used for heating purposes?
What is the primary purpose of a resistor in a lamp circuit?
What is the primary purpose of a resistor in a lamp circuit?
Which type of lamp is specifically designed for use in photography?
Which type of lamp is specifically designed for use in photography?
What is the effect of using a resistor rated at 1/4 watt in a neon lamp circuit?
What is the effect of using a resistor rated at 1/4 watt in a neon lamp circuit?
In the context of lamps used in photography, what is the significance of the term 'integral' when referring to a resistor?
In the context of lamps used in photography, what is the significance of the term 'integral' when referring to a resistor?
What could be a potential drawback of using photographic lamps?
What could be a potential drawback of using photographic lamps?
Which type of miniature lamp is mentioned as having an integral resistor?
Which type of miniature lamp is mentioned as having an integral resistor?
What is a common application for miniature lamps?
What is a common application for miniature lamps?
Which miniature lamp type does NOT include an integral resistor?
Which miniature lamp type does NOT include an integral resistor?
Which of the following miniature lamp types is the smallest?
Which of the following miniature lamp types is the smallest?
What is a characteristic of the T3 1/4 - 10mm MES Neon Lamp?
What is a characteristic of the T3 1/4 - 10mm MES Neon Lamp?
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Study Notes
Incandescent Bulb
- Invented by David Coolidge in the early 20th century
- Revolutionized lighting with a longer-lasting tungsten filament
Parts of an Incandescent Bulb
- Coiled tungsten filament: Glows brightly when electricity passes through it
- Connecting wires: Carry electricity from the bulb's base to the filament
- Electrical contacts: Metallic base that connects to lamp's electrical contacts
- Glass envelope: Surrounds the light bulb and its internal parts, made of glass
- Glass fuse enclosure: Insulates the bulb's fuses, located in the bulb's stem
- Mixture of inert gases: The bulb is filled with non-reactive gases at low pressure
- Screw cap: Threaded base that secures the bulb to a lamp
- Support wires: Holds the filament in place
Invention of the Light Bulb
- Early experiments by Joseph Swan (1878): Carbon paper filaments worked but burned out quickly; demonstrated electric lamps in Newcastle, England
- Thomas Alva Edison's discoveries: experimented with various filaments for long-lasting materials; developed a carbon filament in an oxygen-free bulb that glowed for 40 hours; a bulb lasting over 1500 hours
- Lewis Howard Latimer's improvements: invented an improved carbon filament and patented a method for its manufacture; member of Edison's research team "Edison's Pioneers"
Elements used in Manufacturing
- Lead-in wire
- Glass
- Argon gas
- Inert gas
- Coiled tungsten
- Mica
- Copper
- Nitrogen
Classification of Incandescent Lamps
- Large lamps: Used for interior and exterior lighting
- Miniature lamps: Used in automotive, aircraft, and appliance applications
Miniature Lamps
- Types:
- PAR 38 Lamps
- Infrared Heat Lamps
- Rough Service GLS Lamps
- Low Voltage GLS Lamps
- Daylight Simulation Lamps
- Applications: Automotive, aircraft, and appliance applications.
Photographic Lamps
- Used in photography and projection service.
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