Question

why are sky blue ?
why planets do not twinkle ?
What is electro magnetic induction ?
Define 1 ohm .
Define 1 Amphere .

Answer 1

Ans1. a clear cloudless day-time sky is bluebecause molecules in the air scatterblue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the bluelight has been scattered out and away from the line of sight.

Ans2. Planets, just like the Sun, do not twinkle. Planets are also closer to the Earth than those distant stars, soplanets appear larger in comparison. Due to the planets' closeness to Earth, the light coming from these celestial bodies does not bend much due to Earth's atmosphere.

Ans3. Electromagnetic or magnetic induction is the production of an electromotive force (i.e., voltage) across an electrical conductor in a changing magnetic field.

Ans4. The ohm is defined as an electrical resistance between two points of a conductor when a constant potential difference of one volt, applied to these points, produces in the conductor a current of one ampere, the conductor not being the seat of any electromotive force

Ans5. One ampere of current represents one coulomb of electrical charge (6.24 x 1018 charge carriers) moving past a specific point in one second.

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Answer 2

Heya Frnd........☺

✴ Atmosphere has several particles of various sizes. Since the size of these particles is less than some of the colours , they are more efficient in scattering the colours of shorter wavelength.
Also , blue colour scatter about 10 times more than the red end of the light .

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✴ Planets have various light points which cancel out each other and the apparent position does not change regularly.
In the case of stars , they are far away from our view. Since they emit light , the change which occur regularly in their apparent position, is more clearly visible. Hence they appear to be twinkling.

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✴ When a conductor moves through an electric field , it causes disturbance in the magnetic field lines. This disturbance leads to the flow of current in the conductor. It is called Electro Magnetic Induction. Greater the change , greater will be the current induced.

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✴ At a given temperature the current flowing through the conductor is directly proportional to the Potential Difference across it.

I × R = V

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✴ Rate of Charge transferred in 1 second is called current.

SI Unit = Ampere (A)

I = COULOMB / SECOND
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