Assertion :- The average magnitude of Poynting vectors S → is the intensity of electromagnetic wave. Reason :- The Poynting vector is given by S → = E → × B → 2 µ 0 .

If Assertion is True but the Reason is False

If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion

If both Assertion & Reason are False

E M B I B E

Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Assertion & Reason)>Q 2

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Assertion :- Electromagnetic radiations exert pressure.
Reason :- EM-waves carry both momentum & energy.

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Important Questions on Electromagnetic Waves

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Assertion & Reason)>Q 4

Assertion :- Sound waves cannot travel in vacuum but light waves can travel in vacuum.
Reason :- Sound waves are longitudinal waves and they cannot be polarised but electromagnetic waves are transverse and they can be polarised.

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Assertion & Reason)>Q 5

Assertion :- Environment damage has increased the amount of ozone in the atmosphere.
Reason :- Increase ozone increases amount of UV radiation on Earth.

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Assertion & Reason)>Q 6

Assertion :- The microwaves are better carriers of signals than radio waves.
Reason :- The electromagnetic waves do not require any medium for propagation.

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Assertion & Reason)>Q 7

Assertion :- The average magnitude of Poynting vectors $\vec{S}$ is the intensity of electromagnetic wave.

Reason :- The Poynting vector is given by $\vec{S} = \frac{\vec{E} \times \vec{B}}{2 µ_{0}}$ .

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Assertion & Reason)>Q 8

Assertion :- Displacement current is a fictitious current and has nothing in common with the conduction current.
Reason :- It was proposed by Maxwell only to satisfy Kirchhoff’s junction rule.

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Assertion & Reason)>Q 9

Assertion : EM wave follow superposition principle.
Reason : Differential expression of EM wave is linear.

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Beta Question Bank for Medical: Physics>Chapter 29 - Electromagnetic Waves>Exercise (Assertion & Reason)>Q 10

Assertion :- The gyrating electron can be a source of EMW.
Reason :- The electron in circular motion is accelerated motion.