| ⇦ | 
| ⇨ |
A plane electromagnetic wave of frequency 20 MHz travels through a space along x-direction. If the electric field vector at a certain point in space is 6 Vm⁻¹, then what is the magnetic field vector at that point?
Options
(a) 2×10⁻⁸ T
(b) (1/2) x 10⁻⁸ T
(c) 2 T
(d) (1/2) T
Correct Answer:
2×10⁻⁸ T
Explanation:
The magnetic field, B = E / c, where c = 3 × 10⁸ ms⁻¹
B = 6 / 3 × 10⁸ = 2 × 10⁻⁸ T
Related Questions: - The number of photons of wavelength of 540 nm emitted per second by an electric bulb
- A p-n-p transistor is used in common emitter mode in an amplifier circuit.
- On heating a ferromagnetic substance above curie temperature
- A bar magnet of pole strength 10 A-m is cut into two equal parts breadthwise.
- A potentiometer wire is 100cm long and a constant potential difference is maintained
Topics: Electromagnetic Waves
(28)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The number of photons of wavelength of 540 nm emitted per second by an electric bulb
- A p-n-p transistor is used in common emitter mode in an amplifier circuit.
- On heating a ferromagnetic substance above curie temperature
- A bar magnet of pole strength 10 A-m is cut into two equal parts breadthwise.
- A potentiometer wire is 100cm long and a constant potential difference is maintained
Topics: Electromagnetic Waves (28)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply