If at a particular instant and at a certain point in space the electric field is in the +x-direction and has a magnitude of 4.50 v/m , what is the magnitude of the magnetic field of the wave at this same point in space and instant in time?

1.5 x 10^-8 Tesla

Explanation:

E = 4.5 V/m

The relation between electric field and the magnetic field in electromagnetic wave is given by

c = E / B

Where, c be the velocity of light in vacuum, e be the electric field and B be the magnetic field

B = E / c

B = 4.5 / ( 3 x 10^8)

B = 1.5 x 10^-8 Tesla

an electric circuit

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