Question $6(1$ point$)$

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A disk of charge is placed in the$$x$-$y$$plane$,$ centered at the origin. As you move away from the disk along the z$-$axis, the magnitude of the electric field...

Question $6$ options:

increases exponentially.

decreases exactly by $1/$r $^2.$

decreases, but by a different mathematical relationship.

decreases exactly by $1/$r$.$