Figure a gives the magnitude E(x) of the electric fields that have been set up by a battery along a resistive rod of length 9.00 mm (Figure b). The vertical scale is set by Es = 4.00 x 103V/m. The rod consists of three sections of the same material but with different radii. (The schematic diagram of Figure b does not indicate the different radii.) The radius of section 3 is 2.00 mm. What is the radius of?

(a) Section 1 and

(b) Section2?

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x= 0 (3) x = 9 mm 3. 6. x (mm) (a) (b) (/Ag01)