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irga5000 [103]
3 years ago
13

A night-light uses 3 W.If the voltage is 120 V, what is the current? A.0.025A B.40 A C.360A D.0.25A

Physics
1 answer:
Tomtit [17]3 years ago
6 0
The answer to this question is A. 



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Which of the following statements correctly describes the index of refraction of a material? Select all that apply.
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Answer:

Option C and D only

Explanation:

Option A is incorrect  because refractive index of a material is the ratio of speed of light in vacuum to the speed of light in a any given medium

Option B is correct as the speed of light in vacuum is always greater than the speed of light in any given medium.

Option C is correct

Option D is incorrect

Option E is incorrect because the denser the medium the more is the refractive index. Water is denser than air, hence it should have more refractive index as compared to that of air.

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Both these motions are caused by the Gravitational force of earth.

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