The electric vector vibration of an electromagnetic wave is given by

⇦

⇨

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:

1. Bohr’s postulates quantizes
2. Length of a conductor is 50 cm radius of cross section 0.1 cm and resistivity
3. In a P-N junction
4. Two bodies A and B have masses 20 Kg and 5 Kg respectively. Each one is acted
5. The inductive reactance of an inductor of 1/π henry at 50 Hz frequency is

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