In Davy's safety lamp a copper gauze is used. Why?

Q: How do low energy light bulbs work as fluorescent lamps?

A: The provided question can also be inferred as why and how a fluorescent lamp works even in low…

Q: 3. The electron-volt is a unit of A) voltage. B) current. C) power. D) energy.

A: The electron volt is unit of energy. Since, we know that The electron volt is amount of energy…

Q: 15 F 8.2pF 22 F

A:

Q: determine if is an ohms material or non-ohms

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Q: Ftens 30 N Frens-30 N 45 Based on this diagram, the weight of the picture = O 21.2 N O 25.5 N O 32.8…

A:

Q: Only a small amount of the energy used in an incandescent light bulb (regular bulbs commonly used in…

A: It is true that only small amount of incandescent light is actually converted into light the rest of…

Q: 11 11 11 11 11 11 11 %23

A:

Q: Compare of Incandescent, CFL, and LED Light Bulbs?

A: Introduction: Incandescent light bulbs: It is the most common type of bulb and the simplest form of…

Q: Why are LEDs the lamp of choice in hard to get to places such as high ceilings?

A: as compared to other type of lamps, led lamps hace high durability with  long life periods.…

Q: *In the medical x-ray, rotating anode used with Higher energy x-ray devices O Less energy x-ray…

A: There are two categories of X-ray anodes used. One is stationary and other is rotating. The…

Q: A B D + 1. Bulb B will glow more brightly than A. Bulb D will glow the brightest than A and B. Bulb…

A:

Q: What is the primary purpose of lightening rod?

A: Lightning rods were originally developed by Benjamin Franklin. A lightning rod is very simple --…

Q: James Clerk Maxwell was primarily knows as a | was theoretical physicist experimental physicist…

A: James Clerk Maxwell was primarily a ?

Q: Most metals, like iron, are corroded easily, discuss why aluminum does not corrode even when exposed…

A: Most metals like iron, copper, even inert metals like silver do corrode when exposed to air for…

Q: What is the difference between incandescent bulbs, fluorescent and LED light bulbs?

A: To differentiate between between incandescent bulbs, fluorescent and LED light bulbs.

Q: A school classroom having a general dimension of 20 ft x 40 ft is to be lighted at an average…

A: The number of fixture is calculated by using the given expression below. Here, L, fc, A represent…

Q: a negatively charged electroscope can be discharged by shining an ultraviolet light on it. how does…

A: Answer The photoelectric effect is when a charged particles are emitted from a metal target when…

Q: The electrical domestic tube light gives white fluorescent light because of   A) colision between…

A: the electrical domestic tube light gives white fluorescent light because of falling of ultra violet…

Q: what occurs when outer electrons that buzz about the atomic nucleus encounter electromagetic waves?

A: When an electromagnetic wave is incident on the outermost electron or loosely bound electron of an…

Q: When ultraviolet light falls on certain dyes, visible light is emitted. Why does this not happen…

A: Given: When ultraviolet light falls on certain dyes, visible light is emitted. Why does this not…

Q: 90 10 80 20 193|1|2|3|4|5|6|| 30 -70 001 60 40 50

A: The least count written is 0.001

Q: Why led bulb best than CFL?

A: CFL or Compact fluorescent lamps were used in place of tungsten bulbs for long time. They work by…

Q: Why is chromium so useful for decorative electroplating?

A: Electroplating: Electroplating in simple words is defined as the process of applying a coating of…

Q: Wave your hand back and forth between your face and a fluorescent light bulb. Do you observe the…

A: Here, the activity to perform is to wave the hand back and forth between our face and a fluorescent…

Q: How Laser works?

A: Answer:- Principle of laser :- Laser is produced by the energy released by electrons moving from…

Q: is an example of good conductor of electricity. O a. silicon O b. rubber O c. germanium O d. silver

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Q: Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit:   A. X-rays B.…

A: Light emitting diodes or LED's are semiconducting devices that emit light when current passing…

Q: If the cost is 144.7 c/KWh compare its cost to run LED and incandescent light per 10 hours

A: Power of LED = 0.5 W

Q: What is the principle of LED?

A: A light-emitting diode has a two-lead semiconductor light source. It is a p–n junction diode.

Q: A gas discharge tube glows when a high voltage is applied to it. Explain this statement?

A: In a discharge tube, there is an anode and a cathode with gas-filled inside it.  When a high voltage…

Q: are produced by electric charg O True O False

A: Magnetic Field is the region around a magnetic material or a moving electric charge within which the…

Q: In which of the following materials electrons cannot move from one atom to another? a. silver O b.…

A:

Q: Describe how to a 15-W compact fluorescent lamp provides as much light as a 60-W incandescent lamp.

A: compact  fluorescent lamp

Q: Determine the electrostatic force and gravitational force between two electrons 10−10 ? apart (i.e.…

A:

Q: Wave your hand back and forth between your face and a fluorescent light bulb. Do you observe the…

A: If you wave your hand back and forth between your face and a fluorescent light, you will see a…

Q: In a CRO, the assembly of the intensity grid, focus grid, and accelerating anode is called an…

A: The fill in the blank for the above given statement is as follows : In a CRO, the assembly of the…

Q: Why are LEDs the lamps of choice in hard -to-get-to places, such as high ceilings?

A: LEDs stand for Light-emitting diodes. In LEDs, none of the components consists of glass.

Q: is an example of good conductor of electricity. O a. germanium O b. silver O c. rubber O d. silicon

A: Silver has higher electrical conductivity.

Q: ᴄᴀʟᴄᴜʟᴀᴛᴇ ᴛʜᴇ ᴘʀᴇꜱꜱᴜʀᴇ ᴅʀᴏᴘ (ɪɴ ᴋᴘᴀ) ɪɴ 100 ᴍ ᴏꜰ ʜᴏʀɪᴢᴏɴᴛᴀʟ 20-ᴄᴍ-ᴅɪᴀᴍᴇᴛᴇʀ ᴘɪᴘᴇ ᴍᴀᴅᴇ ᴏꜰ ɴᴇᴡ ᴡʀᴏᴜɢʜᴛ…

A: