B

rate of change of electric flux through loop = E x rate of change of shaded area inside loop direction of original current direction of original current

Figure 10.22 Changing electric flux through an Amperian loop.

Figure 10.22 Changing electric flux through an Amperian loop.

electric field which was not there before, i.e. the electric field is no longer zero. We have gone the full circle of cause and effect.

Let us consider the 'Amperian loop' in Figure 10.22. The plane of this loop is perpendicular to the electric field E. As the tidal wave advances, the electric flux through the loop increases at a steady rate which, according to Ampères law, has the effect of generating a new magnetic field according to the following equation:

Ampère's law (plus Maxwell's extension)

Considering free space, where there are no charges and no currents, I = 0.

But the rate of change of the electric flux

0 0

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