What must be the magnitude of a uniform electric field if it is to have the same energy density as that possessed by a 0.50 T magnetic field?

E = 1.50 × V/m

Explanation:

given data

B = 0.50 T

solution

we know that energy density by the magnetic field is express as

  ...............1

and

energy density due to electric filed is

    ...............2

and here

so that

E =      ...................3

put here value and we get

E = 3 ×  × 0.50

E = 1.50 × V/m

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate

d.7.5cm is your answer