3. What is the electric resistance of a copper wire 225 mm long with a radius of 0.85 mm? 4. An Iron rod's diameter is 9.00 mm and its resistivity at 20 ° C is 9.71x108 Q.m. How long must the rod be to offer a resistance of 3.00 x 10³ Q?
3. What is the electric resistance of a copper wire 225 mm long with a radius of 0.85 mm? 4. An Iron rod's diameter is 9.00 mm and its resistivity at 20 ° C is 9.71x108 Q.m. How long must the rod be to offer a resistance of 3.00 x 10³ Q?
College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter20: Electric Current, Resistance, And Ohm's Law
Section: Chapter Questions
Problem 70PE: Unreasonable Results (a) What current is needed to transmit 1.00 102 MW of power at 10.0kV? (b)...
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