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(A) : We do not feel the pressure when s...

(A) : We do not feel the pressure when sun shines on our hand even the energy being absorbed from the EM waves (Our hands get warm). (R) : EM waves transfer momentum to our hands but because speed of light is very large so the momentum transfered is very small.

A

Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.

B

Both 'A' and ’R' are true and 'R' is not the correct explanation of 'A

C

A' is true and 'R' is false

D

'A' is false and R' is true

Text Solution

Verified by Experts

The correct Answer is:
A
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AAKASH SERIES-ELECTROMAGNETIC WAVES-EXERCISE -IB
  1. (A) : In an electromagnetic wave, the electric and magnetic fields osc...

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  2. (A) : Electromagnetic waves are tranverse in nature. (R) : The Poyntin...

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  3. (A) : We do not feel the pressure when sun shines on our hand even the...

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  4. (A) : In micro wave oven the energy is not wasted in heating up the ve...

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  5. A : infrared waves are often called heat waves. R : Infrared waves v...

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  6. A : The centre of sensitivity of our eyes coincides with the centre of...

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  7. A current I is flowing in a straight conductor of length L. The magnet...

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  8. (A) : In Ampere Maxwell law, displacement current has same physical ef...

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  9. (A ): Speed of EM wave in a medium depends on electrical permittivity ...

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  10. (A ): E.M. waves can show diffraction effect (R) : E.M waves are trans...

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  11. (A ): In electromagnetic wave, electric and magnetic fields oscillate ...

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  12. (A ): The light can travel in vacuum but sound cannot do so (R) : Ligh...

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  13. (A): Gamma rays are more energetic than X-rays (R) : Gamma rays are of...

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  14. Assertion : The earth without its atmosphere would be inhospitably col...

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  15. A : Environmental damage has depleted the ozone layer in the atmosphe...

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  16. (A) : The microwaves are better carriers of signals than radio waves. ...

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  17. Assertion (A) : The presence of CO(2) in the air accelerates corrosio...

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  18. A satellite orbiting close to the surface of earth does not fall down ...

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  19. (A) : The average magnitude of poynting vector vecS is the intensity o...

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  20. A : Long distance radio broadcasts use short-wave bands. R : Ionosp...

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