Q18.In an electromagnetic wave, the electric field vector and magnetic field vector are given as E = E0ˆi and → B = B0ˆk, respectively. The direction of propagation of electromagnetic wave is along: (1) (ˆk) (2) ˆJ (3) (−ˆk) (4) (−ˆj)
What This Question Tests
This question tests the fundamental understanding that the direction of propagation of an electromagnetic wave is perpendicular to both the electric and magnetic field vectors, given by their cross product.
Concepts Tested
Formulas Used
Direction of propagation ∝ E x B
📚 NCERT Sections This Tests
4.4 — A Horizontal Overhead Power Line Carries A Current Of 90 A In East To
Physics Class 11 · Chapter 4
4.4 A horizontal overhead power line carries a current of 90 A in east to west direction. What is the magnitude and direction of the magnetic field due to the current 1.5 m below the line?
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Physics Class 11 · Chapter 1
1.14 Consider a uniform electric field E = 3 × 103 î N/C. (a) What is the flux of this field through a square of 10 cm on a side whose plane is parallel to the yz plane? (b) What is the flux through the same square if the normal to its plane makes a 60° angle with the x-axis?
10.2 — What Is The Shape Of The Wavefront In Each Of The Following Cases:
Physics Class 12 · Chapter 10
10.2 What is the shape of the wavefront in each of the following cases: (a) Light diverging from a point source. (b) Light emerging out of a convex lens when a point source is placed at its focus. (c) The portion of the wavefront of light from a distant star intercepted by the Earth.
📋 Question Details
- Chapter
- EM Waves
- Topic
- Direction of propagation of EM waves
- Year
- 2021
- Shift
- 20 Jul Shift 2
- Q Number
- Q18
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 8: Electromagnetic Waves
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