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A block in the shape of a rectangular solid has a cross-sectional area of 4.48 cm2 across its width, a front-to-rear length of 22.1 cm, and a resistance of 800 ?. The block's material contains 6.50 x 1022 conduction electrons/m3. A potential difference of 35.0 V is maintained between its front and rear faces.

(a) What is the current (in A) in the block?

(b) If the current density is uniform, what is its magnitude? What are

(c) the drift velocity (in meter per second) of the conduction electrons and

(d) the magnitude of the electric field in the block?

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