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Q. Why does sun seems flat during sunrise and sunset?
Answer:-
The sun rays have to move through a larger atmospheric distance. The majority of the blue light and shorter wave lengths are removed by scattering. Merely red colour which is least scattered is received by our eyes as well as appear to come from sun. Therefore the appearance of sun at sunset or sunrise looks almost flat.
The total number of neutrons in dipositive zinc ions with mass number 70 is: (1) 34 (2) 40 (3) 36 (4) 38 Ans:40
Q. Why nichrome is used as heating element in electric heating devices? Nichrome, an alloy of nickel as well as chromium is used as the heating element for the following reaso
Q. Explain about end rule? When glanced from one end if the current through the solenoid is along clockwise direction the nearer end corresponds to South Pole and the other end
A long, straight, current-carrying wire carries a current from west to east. A compass is held above the wire. a. Which direction does the north pole of the compass point? S
note
Radiation Hazards: 1. They can injure our body cells. 2. Excessive radiation might be cause cancer. 3. Energetic radiation penetrates inside the body and can cause other
a) Formation of domains b) On the basis of domains formed c) These are strongly attracted in an external magnetic field i.e. they easily go from low to high field region d
It is the degree or extent by which magnetic lines of force can enter a substance and is expressed by µ.
Q. What are polar molecules? Give an example. i) A polar molecule is one in that the centre of gravity of the positive charges is separated from the centre of gravity of the ne
What is Faraday's law of electromagnetic induction? Determine its differential form.
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