EM wave: E and B fields are: MCQ with Answer and Explanation

Question

Share Report Error

EM wave: E and B fields are:

A. Parallel

B. Random

C. Parallel to propagation

D. Perpendicular to each other and propagation

Answer: Option D

Solution (By JKSSB Mock Tests)

EM waves transverse: E ⊥ B ⊥ propagation direction. Derived from Maxwell's equations. Memory tip: 'EM wave: right-hand rule for E×B direction'. Wave property frequently tested in competitive modern physics sections.

This question belongs to: Science Physics

Request complete Subject PDF

Discuss this Question (0)

No comments yet. Be the first to start the discussion!

Practice More Physics Questions

Question #1

Share Report

Which of the following has the highest specific heat capacity?

A. Water

B. Copper

C. Lead

D. Iron

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option A

Explanation:
Water 4200 J/kg°C, used as coolant. Iron ~450, copper ~385, lead ~128.

This question belongs to: Science Physics

Question #2

Share Report

The unit of magnetic field strength is

A. Farad

B. Henry

C. Tesla

D. Weber

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option C

Explanation:
Tesla (T) = N/(A·m) = Wb/m². Weber is magnetic flux. Henry is inductance. Farad is capacitance. Gauss is another unit (1 T = 10⁴ G).

This question belongs to: Science Physics

Question #3

Share Report

A radioactive nucleus emits a beta particle. Its atomic number

A. Remains same

B. Increases by 1

C. Decreases by 1

D. Decreases by 2

View Answer & Solution Discuss

Get Complete Subject PDF for Science

Correct Answer: Option B

Explanation:
β⁻ decay: neutron → proton + electron, Z increases by 1.

This question belongs to: Science Physics

Explore All Physics MCQs