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A student wants to compare how resistivity dictates the values of resistance of three different materials having identical geometries. He takes three pieces of different wires, Aluminum (1.5 × 10-8 Ω. m), Nichrome (1.5 × 10-6 Ω. m) and a Fused Quartz (7.5 × 1016Ω. m), all with an identical cross-sectional diameter of 0.8 cm and are 20 cm long.
Your task is to
1) Calculate the resistance of both pieces, and
2) Compare the values by taking ratios and briefly comment what you expect from their drift velocities and charge carrier concentrations.
a model train moves along a horizontal circular track with a radius of 0.5 m. starting from rest the train
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A uniformly charged disk of radius 35.0 cm carries a charge density of 8.20*10 -3 C/m 2 . Compute the electric field on the axis of the disk at the following distances from the center of the disk. Distances are 5.00 cm, 10.00 cm, 50.00 cm, and 2..
Find the current in the wire, the resistance of the wire, the power dissipated by the wire and the potential difference between the ends of the wire.
An electric motor can accelerate a Ferris wheel of moment of Inertia I=20,000kg m2 from rest to 10rev/min in 12second. Find what power is required to maintain this rotational speed
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