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Which of the following is incorrect abou...

Which of the following is incorrect about a plane electromagnetic wave?

A

It is produced during de-excitation of nucleus in radioactivity

B

It is produced when high speed electron enters into target of high atomic weight

C

An electron orbiting around its nucleus in a stationary orbit does emit electromagnetic wave

D

The electric energy and the magnetic energy have equal average values

Text Solution

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The correct Answer is:
C
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AAKASH INSTITUTE ENGLISH-Mock Test 34: PHYSICS-Example
  1. Which of the following is incorrect about a plane electromagnetic wave...

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  2. The poynting vector in vaccum is represented by (where symbols have th...

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  3. The average intensity of electromagnetic wave is (where symbols have t...

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  4. When a capacitor is charged then l(c)= conduction current l(d) = dis...

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  5. Sum of the areas of two squares is 544 m^(2). If the difference of the...

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  6. If lambda(v) , lambda(x) and lambda(m) represent the wavelength of v...

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  7. Which of the following are electromagnetic waves ?

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  8. Image of an object in a convex mirror is

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  9. The minimum distance between the object and its real image for concave...

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  10. Draw E and V versus r on the same graph for a point charge.

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  11. Can we project the image formed by a plane mirror on to a screen? Give...

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  12. When the two plane mirror are parallel to each other, then the number ...

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  13. An object is placed at a distance f in the front of a convex mirror. ...

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  14. A short linear object of length b lies along the axis of a concave mir...

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  15. The value of refractive index of diamond

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  16. For total internal reflection to take place, the angle of incidence i ...

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  17. If c is velocity of light in vacuum and v is the velocity of light in ...

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  18. Which of the following statements is true?

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  19. A light enters a glass slab of thickness t with angle of incidence i s...

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  20. If a ray of light is incident from rarer medium at an angle 45° on the...

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