| ⇦ | 
| ⇨ |
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: - Electrons with energy 80 keV are incident on the tungsten target of an X-ray tube.
- There are four light-weight-rod samples A,B,C,D seperately suspended by threads
- The intensity of magnetisation of a bar magnet is 5×10⁴ Am⁻¹. The magnetic length
- Nickel shows ferromagnetic property at room temperature. If the temperature is
- Current flows in semi-conductors through
Topics: Electromagnetic Waves
(28)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Electrons with energy 80 keV are incident on the tungsten target of an X-ray tube.
- There are four light-weight-rod samples A,B,C,D seperately suspended by threads
- The intensity of magnetisation of a bar magnet is 5×10⁴ Am⁻¹. The magnetic length
- Nickel shows ferromagnetic property at room temperature. If the temperature is
- Current flows in semi-conductors through
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