Assume the amplitude of the electric field in a plane electromagnetic wave is e1 and the amplitude of the magnetic field is b1. the source of the wave is then adjusted so that the amplitude of the electric field doubles to become 2e1. (i) what happens to the amplitude of the magnetic field in this process? it becomes four times larger. it becomes two times larger. it can stay constant. it becomes one-half as large. it becomes one-fourth as large. (ii) what happens to the intensity of the wave? it becomes four times larger. it becomes two times larger. it can stay constant. it becomes one-half as large. it becomes one-fourth as large. need ?

I) It becomes two times larger

II) It becomes four times larger

Explanation:

I) Electric field is directly proportional to Magnetic field and as such, if one is increased, the other is also increased by the same proportion.

The formula is given as

c = speed of light, therefore

II) Intensity of is proportional to the square of amplitude, as such

If amplitude is doubled (), intensity is

This means the intensity becomes four times bigger.

real, smaller and upside-down.   so the answer should be b.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force