1
NEET 2021
+4
-1
For a plane electromagnetic wave propagating in x-direction, which one of the following combination gives the correct possible directions for electric field (E) and magnetic field (B) respectively?
A
$$- \widehat j + \widehat k, - \widehat j + \widehat k$$
B
$$\widehat j + \widehat k, \widehat j + \widehat k$$
C
$$- \widehat j + \widehat k, - \widehat j - \widehat k$$
D
$$\widehat j + \widehat k, - \widehat j - \widehat k$$
2
NEET 2020 Phase 1
+4
-1
The ratio of contributions made by the electric field and magnetic field components to the intensity of and electromagnetic wave is : (c = speed of electromagnetic waves)
A
1 : 1
B
1 : c
C
1 : c2
D
c : 1
3
NEET 2019
+4
-1
Which colour of the light has the longest wavelength?
A
blue
B
violet
C
red
D
green
4
NEET 2018
+4
-1
An EM wave is propagating in a medium with a velocity $$\overrightarrow v = v\widehat i$$. The instantaneous oscillating electric field of this em wave is along +y axis. Then the direction of oscillating magnetic field of the em wave will be along
A
z direction
B
+z direction
C
–y direction
D
–x direction
EXAM MAP
Medical
NEET