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12th Uttar Pradesh Board
IMPORTANT
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An earth orbiting satellite has solar energy collecting panel with total area 5 m2. If solar radiations are perpendicular and completely absorbed, the average force associated with the radiation pressure is

(Solar constant=1.4 kWm-2)

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Important Questions on Electromagnetic Waves

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12th Uttar Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Electromagnetic Waves>Exercise>Q 35
In an electromagnetic wave, the electric and magnetizing fields are 100 V m-1 and  0.265 A m-1. The maximum energy flow is
EASY
12th Uttar Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Electromagnetic Waves>Exercise>Q 36
What physical quantity is the same for X-rays of wavelength 10-10 m, red light of wavelength 6800 Å and radio waves of wavelength 500 m?
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12th Uttar Pradesh Board
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Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Electromagnetic Waves>Exercise>Q 37
A plane electromagnetic wave travels in vacuum along the Z-direction. What can you say about the directions of its electric and magnetic field vectors? If the frequency of the wave is 30 MHz, what is its wavelength? Take, c = 3×108 m/s
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12th Uttar Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Electromagnetic Waves>Exercise>Q 38
A radio can tune in to any station in the 7.5 MHz to 12 MHz bands. What is the corresponding wavelength band? Take, c = 3×108 m/s
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12th Uttar Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Electromagnetic Waves>Exercise>Q 39
A charged particle oscillates about its mean equilibrium position with a frequency of 109 Hz. What is the frequency of the electromagnetic waves produced by the oscillator?
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12th Uttar Pradesh Board
IMPORTANT
Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 8 - Electromagnetic Waves>Exercise>Q 40
The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B0=510 nT. What is the amplitude of the electric field part of the wave?