| ⇦ | 
| ⇨ |
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 simple pendulum has a time period T₁ when on the earth’s surface and T₂ When taken
- A magnetic needle suspended parallel to a magnetic field requires √3J of work
- A coil has resistance 30 ohm and inductive reactance 20 ohmn at 50 Hz frequency.
- In a laser tube, all the photons
- A tuning fork of frequency x produces 4 beats with a source of 256 Hz and 8 beats
Topics: Electromagnetic Waves
(28)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A simple pendulum has a time period T₁ when on the earth’s surface and T₂ When taken
- A magnetic needle suspended parallel to a magnetic field requires √3J of work
- A coil has resistance 30 ohm and inductive reactance 20 ohmn at 50 Hz frequency.
- In a laser tube, all the photons
- A tuning fork of frequency x produces 4 beats with a source of 256 Hz and 8 beats
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