1
AP EAPCET 2025 - 24th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The oscillating electric and magnetic field vectors of an electromagnetic wave are along

A

the same direction and in same phase.

B

the same direction but have a phase difference of $90^{\circ}$.

C

mutually perpendicular directions and are in same phase.

D

mutually perpendicular directions but have a phase difference of $90^{\circ}$.

2
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The waves having maximum wavelength among the following electromagnetic waves is
A

X-rays

B

radio waves

C

UV-waves

D

visible rays

3
AP EAPCET 2025 - 23rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of the magnitudes of the electric field and $10^8$ times the magnetic field of a plane electromagnetic wave is

A

$1: 3$

B

$3: 1$

C

$1: 1$

D

$1: \sqrt{3}$

4
AP EAPCET 2025 - 22nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the rms value of the electric field of electromagnetic waves at a distance of 3 m from a point source is $3 \mathrm{NC}^{-1}$, then the power of the source is

A

10.8 W

B

8.1 W

C

5.4 W

D

2.7 W

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