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1. An iron wire with a diameter of 1.2 mm has a uniform electric field of 0.35 V/m imposed along its entire length. The temperature of the wire is 45 °C. Assume one free electron per atom.
a. Determine the resistivity of the wire ?
b. What is the current density in the wire?
c. What is the total current in the wire?
d. What potential difference must exist between the ends of a 3-m length of the wire to produce the stated electric field?
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An oil droplet with 13.0 excess electrons is observed between two parallel electrodes spaced 11.0mm apart. What is the radius of the droplet
Density is the ratio of an object;s mass to its volume. Would you except density to be a vector or a sdcalar quanity? Explain.
Two identical aluminium objects are insulated from their surroundings. Object A has a net charge of excess electrons. Object B is grounded. Which object is at the higher potential.
A Carnot engine operating between energy reservoirs at temperatures 300K \rm K and 530K K produces a power output of 1200W, What is the rate of heat output
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