why tungsten is used in incandescent lamp instead of nichrome though nichrome has high melting point
Answers were Sorted based on User's Feedback
Answer / saurabh
Nichrome has high resistivity than tungstan,bt tungstan has high melting point than nichrome...that's why tungstan is used as filament of incandescent lamp.
Is This Answer Correct ? | 6 Yes | 0 No |
Pure tungsten has some amazing properties including the highest melting point (3695 K), lowest vapor pressure, and greatest tensile strength out of all the metals.Because of these properties it is the most commonly used material for light bulb filaments. It can reach high temperature before melting and therefore emit a brighter light than nichrome can. Nichrome on the other hand, although it has a pretty high melting point (1673 K) it is not as high as tungsten, but it is often used for heating devices, such as a blowdryer. An electric current can heat the filament around 2000-3300 K, which stays below the melting point of tungsten but above that of nichrome.
Is This Answer Correct ? | 3 Yes | 0 No |
A three phase load, around 4 km away from the 11/0.433KV distribution transformer (Neutral of Transformer is solidily earthed) and consisting of mainly very costly and sensitive electronic equipments is giving trouble due to high voltage difference between neutral and body earth. Whether this problem can addressed by connecting neutral at the load point solidly to earth?
9.The material used for coating the electrode is called........
what is the difference between inductive load and capacitive load?give me some examples in general
how to check three phase motor torque value?
how does induction motors works.
inductance and capacitance may result in periodic reversals of the direction of energy flow,how???
what is the difference between capacitive and resistive voltage divider?
what is use of stater and choke in tube light.?
DESCRIBE THE CONSTRUCTION ANDOPERATION OF BELT CONVEYORS AND SCR CONVEYORS , DRAW NEAT SKETCHES
a distribution transformer(3 phase)supplying 440volt per phase.now suppose one of phase voltage(230volt) becomes zero.what will be the cause ?
What is the difference between the relay and the circuit breaker?
Why the power generated in dams is complex power? Why the generators in dams cannot produce Real power directly (i.e power which has zero reactive part)?