EASY
NEET
IMPORTANT
Earn 100
In EM wave, . If and , then average power per unit area is,
50% studentsanswered this correctly
Important Questions on Electromagnetic Waves
MEDIUM
NEET
IMPORTANT
If in an EM wave propagating along -axis, then electric field is given by,
MEDIUM
NEET
IMPORTANT
The electromagnetic wave of intensity falls on the metal surface on area is completely absorbed by it. Find out the force exerted by the beam.
MEDIUM
NEET
IMPORTANT
A plane electromagnetic wave of frequency travels in free space in the -direction. At some point and at some instant, the electric field has its maximum value of in -direction. The wavelength of the wave is,
EASY
NEET
IMPORTANT
A plane electromagnetic wave of frequency travels in free space in the -direction. At some point and at some instant, the electric field has its maximum value of -direction. The period of the wave will be,
EASY
NEET
IMPORTANT
A plane electromagnetic wave of frequency travels in free space in the -direction. At some point and at some instant, the electric field has its maximum value of -direction. The angular frequency of e.m.f. wave will be (in ),
HARD
NEET
IMPORTANT
A plane electromagnetic wave of frequency travels in free space in the -direction. At some point and at some instant, the electric field has its maximum value of -direction. The propagation constant of the wave will be,
MEDIUM
NEET
IMPORTANT
Assertion :- In electromagnetic waves electric field and magnetic field lines are perpendicular to each other.
Reason :- E and B are self sustaining
MEDIUM
NEET
IMPORTANT
Assertion :- Electromagnetic radiations exert pressure.
Reason :- EM-waves carry both momentum & energy.
