Answered: 6. A toroid of inner radius 203.50 mm…

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

Chapter30: Sources Of The Magnetic Field

Section: Chapter Questions

Problem 30.5OQ: Two long, straight wires cross each other at a right angle, and each carries the same current I...

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6. A toroid of inner radius 203.50 mm and an outer radius of 500.98 mm carries an electric current of 7.4 A. How many times must the wire be wound about it such that the toroid will yield a magnetic field of 8.88 mT at points within the coils 31 mm distant from the center? A. 154 B. 215 C. 301 D. 186 7. Which of the following is true about the magnetic field in a long, straight, current-carrying conductor relative to the radius? A. It decreases with the radius B. It is perpendicular to the radius C. It is tangential to the radius D. It increases with the radius 8. Which of the following is true about the field lines in cylindrical conductors. A. They are divergent lines throughout the cylinder. B. They are lines parallel to the radius C. They are circles concentric about the axis D. They are convergent lines throughout the cylinder 9. Which of the following is true about the total field at each point of a solenoid? A. It is the vector sum of the individual currents in the system. B. It ks the scalar product of the fields due to each turn. C. It is the vector sum of the fields due to each turn. D. It is the scalar product of the individual currents in the system. 10. Which of the following principles do not relate to Ampere’s Law A. Ampere’s Law is only applicable for geometries with highly-symmetrical current distributions. B. Individual currents must always be assigned a positive value, regardless of their direction and magnitude. C. Only the currents traversing the region inside the path must have some contribution to the field. D. Ampere’s Law is only applicable if all electrical currents under consideration are independent of time.

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