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4. [012 Points] DETAILS PREVIOUS ANSWERS MY NOTES A carbon resistor is 3 mm long and has a constant cross section of 0.1 mr'nz. The

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4. [012 Points] DETAILS PREVIOUS ANSWERS MY NOTES A carbon resistor is 3 mm long and has a constant cross section of 0.1 mr'nz. The conductivity of carbon at room temperature is U = 3 x 104 per ohm-m. In a circuit its potential at one end ofthe resistor is 15 volts relative to ground, and at the other end the potential is 21 volts. Calculate the resistance R and the current I. R = 0.4995 x Q I: 12.01 x amperes Additional Materials E] eBook

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