What is a LED desk lamp?

Compare the salient features of LED and CFL based on (i) Lamp efficiency (ii) Life span.
Answer : Here's a comparison of **LED** and **CFL** based on **lamp efficiency** and **life span**: ### 1. Lamp Efficiency: - **LED (Light Emitting Diode):** - **Higher Efficiency:** LEDs ... longer than **CFLs**. - **CFLs** are moderately energy-efficient and have a shorter lifespan compared to LEDs....

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What is a compact fluorescent lamp (CFL)?

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Why does a lamp not obey Ohms law?

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Describe the control of a single lamp from three places. Draw the relevant circuit diagram.

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A workshop measures 10m × 25m. The shop is illuminated by 24 lamps of 200 watts each. The lumen efficiency of each lamp is 15 lumens per watt. Depreciation factor is assumed to be 0.8 and a coefficient of utilization 0.5. Determine the illumination on the working plane.

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Illustrate with neat wiring diagram a single lamp control by two-point method.

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A uniform illumination of 150 lux is to be obtained on the floor of a room measuring 15m x 15m by arranging electric lights suitably. Calculate the number of lamps and wattage of each lamp if lamp efficiency is 20 lumens/watt. Assume and write suitable values of constants required for this calculation.

A uniform illumination of 150 lux is to be obtained on the floor of a room measuring 15m x 15m by arranging electric lights suitably. Calculate the number of lamps and wattage of each ... lamp efficiency is 20 lumens/watt. Assume and write suitable values of constants required for this calculation.

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Explain control of a single lamp from four places. Draw the relevant circuit diagram.

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Write any four safety measures and precautions to be followed for a special purpose lamp.

Write any four safety measures and precautions to be followed for a special purpose lamp.
Answer : Here are four safety measures and precautions to follow when using a special-purpose lamp: 1. **Proper Ventilation**: Ensure the lamp is used in a well-ventilated area, especially if it's a ... the specifications for the lamp. Using incorrect power can lead to lamp failure or cause a safety hazard....

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State the factors to be considered while selecting a lamp for a particular application.

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Illustrate with neat wiring diagram a single lamp control by two point method.

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What is the purpose of a ballast in a fluorescent lamp circuit?

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What is the principle of slit lamp?

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What is the principle of lamp test?

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What is the principle of sodium lamp?

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Which lamp is used in the Newton-Ring experiment?

Which lamp is used in the Newton-Ring experiment?
Answer : In the Newton's rings experiment, a **monochromatic light source** is typically used. This is because the interference pattern, which forms the rings, depends on the wavelength of light. Using ... . The monochromatic nature of the light helps in observing clear and well-defined Newton's rings....

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If one lamp connects between two phases it will glow or not?

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State the use of following: (i) Screw driver (ii) Nose pliers (iii) Wire gauge (iv) Test lamp.

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Draw wiring diagram for connection of one lamp controlled from two places. State the application of this connection.

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Draw circuit diagram for one lamp controlled with one switch.

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Describe the following energy conservation techniques in lighting system: i) replacing lamp source ii) using light control gear.

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State the selection criterion of the lamp for various purposes.

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Explain the working of HPMV Lamp with neat diagram.

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Define the terms incandescent and incandescent lamp.

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State the factors considered for selection of mounting of fluorescent lamp in residential areas.

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Explain the working of fluorescent lamp.

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Explain the working of HID lamp.

Explain the working of HID lamp.
Answer : HID (High-Intensity Discharge) lamps are a type of electric light that produces light by creating an arc between two electrodes inside a gas-filled tube. They are known for their ... ionization. Their high brightness and energy efficiency make them useful for many large-scale lighting applications....

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