Normal type of MCQ with one correct option
The speed of electromagnetic waves in a vacuum is given by
(0 (0
Normal type of MCQ with one correct option
In an electromagnetic wave traveling in air, the amplitude E0 and B0 of the electric and magnetic fields are related as (here c is the speed of the wave in air)
E0 = cB0
E0 = c2 B0
E0 = B0
Normal type of MCQ with one correct option
If vx , vm and vr respectively are the speed of X-rays, microwaves and radio waves in air, then
vx > vm > vr
vx < vm < vr
vx = vm > vr
vx = vm = vr
Normal type of MCQ with one correct option
When a plane electromagnetic wave travels in vacuum, the average electric energy density is given by (here E0 is the amplitude of the electric field of the wave)
A,B
B
C,D
A,C & D
Current
Product of current
Product of inductance and current
Product of inductance and change in current
1A
2A
4A
8A
A straight line
A parabola
A hyperbola
Exponential
Both A and R are true and R is correct explanation of A
Both A and R are true and R is not correct explanation of A
A is true, R is false
A is false, R is true