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A block in the shape of a rectangular solid has a cross-sectional area of 5.24 cm2 across its width, a front-to-rear length of 15.7 cm, and a resistance of 977 Ω. The block's material contains 4.45 × 1022 conduction electrons/m3. A potential difference of 39.9 V is maintained between its front and rear faces. (a) What is the current in the block

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krlosdark12

Answer:

The current through the block is 40.8mA

Explanation:

For question a we can apply the macroscopic form of Ohm's law:

[tex]I=\frac{V}{R}[/tex]

where:

V= potential difference

R= The resistance of the block

substituting the values on the formula we have:

[tex]I=\frac{39.9V}{977 \Omega}\\\\I=40.8mA[/tex]

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