| ⇦ | 
| ⇨ |
The electric vector vibration of an electromagnetic wave is given by E=(50 NC⁻1) sin ω(t-x/c). The intensity of the wave is
Options
(a) 2.3 Wm⁻²
(b) 4.3 Wm⁻²
(c) 3.3 Wm⁻²
(d) 1.8 Wm⁻²
Correct Answer:
3.3 Wm⁻²
Explanation:
The Intensity is, I = (1/2) ε₀E₀²c
I = (1/2) × (8.85 × 10⁻¹² N-m²C⁻²) × (50 NC⁻¹)² × 3 × 10⁸ ms⁻¹
I = 3.3 Wm⁻²
Related Questions: - A proton and helium nucleus are shot into a magnetic field at right angles to the field
- A transformer of 100% efficiency has 200 turns in the primary coil and 40000 turns
- Four blocks of same mass connected by cords are pulled by a force F
- In an orbital motion, the angular momentum vector is
- If the binding energy of the nucleon in ₃⁷Li and ₂⁴He nuclei are 5.60 MeV and 7.06 MeV
Topics: Electromagnetic Waves
(28)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A proton and helium nucleus are shot into a magnetic field at right angles to the field
- A transformer of 100% efficiency has 200 turns in the primary coil and 40000 turns
- Four blocks of same mass connected by cords are pulled by a force F
- In an orbital motion, the angular momentum vector is
- If the binding energy of the nucleon in ₃⁷Li and ₂⁴He nuclei are 5.60 MeV and 7.06 MeV
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