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11. Two parallel wires have the same current of 30 A in the opposite directions. If the force per unit length (F/L) is 2.52 x 10 N/m, how close to each other would they be? a. 7.14 cm b. 71.4 m c. 0.714 cm d. none of these

11. Two parallel wires have the same current of 30 A in the opposite directions. If the force per unit length (F/L) is 2.52 x 10 N/m, how close to each other would they be? a. 7.14 cm b. 71.4 m c. 0.714 cm d. none of these

Physics for Scientists and Engineers, Technology Update (No access codes included)
Physics for Scientists and Engineers, Technology Update (No access codes included)
9th Edition
ISBN:9781305116399
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter31: Faraday’s Law
Section: Chapter Questions
Problem 31.42P: 100-turn square coil of side 20.0 cm rotates about a vertical axis at 1.50 103 rev/min as indicated...
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Question 11

28% O 10:21 PM it 9. A multi-loop coil has 2.00 A current passing through and its radius is 30 cm. If the B field at the center of the coil is 0.0017 T, find the number of loops the coil has. a. 1275 b. 203 c. 812 d. 406 10. A solenoid has 2500 turns over the length of 70 cm. How much current is needed to generate 0.50 T magnetic field at the center of the solenoid? a. 11.4 A b. 11141 A c. 111.4 A d. none of these 11. Two parallel wires have the same current of 30 A in the opposite directions. If the force per unit length (F/L) is 2.52 x 10 N/m, how close to each other would they be? a. 7.14 cm b. 71.4 m c. 0.714 cm d. none of these The simple design with a slidable wire section can be treated as a generator. If the magnetic field is 0.65 T and the speed of the slide wire is 4.5 m/sec, (L=75 cm)
Transcribed Image Text:28% O 10:21 PM it 9. A multi-loop coil has 2.00 A current passing through and its radius is 30 cm. If the B field at the center of the coil is 0.0017 T, find the number of loops the coil has. a. 1275 b. 203 c. 812 d. 406 10. A solenoid has 2500 turns over the length of 70 cm. How much current is needed to generate 0.50 T magnetic field at the center of the solenoid? a. 11.4 A b. 11141 A c. 111.4 A d. none of these 11. Two parallel wires have the same current of 30 A in the opposite directions. If the force per unit length (F/L) is 2.52 x 10 N/m, how close to each other would they be? a. 7.14 cm b. 71.4 m c. 0.714 cm d. none of these The simple design with a slidable wire section can be treated as a generator. If the magnetic field is 0.65 T and the speed of the slide wire is 4.5 m/sec, (L=75 cm)
Expert Solution
Step 1

11) Force per unit length of wire = μo I1I2/2πd2.52 * 10-4 = 4π * 10-7 * 30* 30/(2πd)d = 0.714 m d = 71.4 cm 

 

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