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1. As per Faraday's laws of electromagnetic induction, an emf is induced in a conductor whenever it A. lies perpendicular to the magnetic flux. B. lies in a magnetic field. C. cuts magnetic flux. D. moves parallel to the direction of the magnetic fielc 2. When current runs through a wire, a magnetic field is created. However, computer cables create little to no magnetic field external to their insulation. How is this possible? (Hint: computer cables contain multiple wires inside) A. The cables are insulated with plastic. B. The supply and return cables run anti parallel and their magnetic fields essentially cancel out. C. The supply and return cables run parallel and their magnetic fields essentially cancel out. D. The currents are too small to create a significant magnetic field. 3. A square loop of wire with 10 turns and a side length of 1 m is placed in a changing magnetic field. If the magnetic field changes from 2 T to 4 T within 8 seconds, what is the average induced emf? A. 1.25 V В. 2.5 V C. O V D. 5 V

1. As per Faraday's laws of electromagnetic induction, an emf is induced in a conductor whenever it A. lies perpendicular to the magnetic flux. B. lies in a magnetic field. C. cuts magnetic flux. D. moves parallel to the direction of the magnetic fielc 2. When current runs through a wire, a magnetic field is created. However, computer cables create little to no magnetic field external to their insulation. How is this possible? (Hint: computer cables contain multiple wires inside) A. The cables are insulated with plastic. B. The supply and return cables run anti parallel and their magnetic fields essentially cancel out. C. The supply and return cables run parallel and their magnetic fields essentially cancel out. D. The currents are too small to create a significant magnetic field. 3. A square loop of wire with 10 turns and a side length of 1 m is placed in a changing magnetic field. If the magnetic field changes from 2 T to 4 T within 8 seconds, what is the average induced emf? A. 1.25 V В. 2.5 V C. O V D. 5 V

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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1. As per Faraday's laws of electromagnetic induction, an emf is induced in a conductor whenever it A. lies perpendicular to the magnetic flux. B. lies in a magnetic field. C. cuts magnetic flux. D. moves parallel to the direction of the magnetic fielc 2. When current runs through a wire, a magnetic field is created. However, computer cables create little to no magnetic field external to their insulation. How is this possible? (Hint: computer cables contain multiple wires inside) A. The cables are insulated with plastic. B. The supply and return cables run anti parallel and their magnetic fields essentially cancel out. C. The supply and return cables run parallel and their magnetic fields essentially cancel out. D. The currents are too small to create a significant magnetic field. 3. A square loop of wire with 10 turns and a side length of 1 m is placed in a changing magnetic field. If the magnetic field changes from 2 T to 4 T within 8 seconds, what is the average induced emf? A. 1.25 V В. 2.5 V C. O V D. 5 V 4. A 500-turn solenoid develops an average induced voltage of 60 V. Over what time iterval must a flux change by 0.06 Wb occur to produce such a voltage? B. 0.1 s A. 0.01 s C 0.5 s D. 5 s 5. A current may be induced in a coil by A. moving one end of the bar through the coil. B. moving the coil toward the one end of the bar magnet. C. holding the coil near a second coil while the electric current in the second. D. all of the above. 6. What happens when two polarizing filters are placed so that their axes of polarization. Are perpendicular to each other? A. Transmitted light is slightly weaker B. There is no transmitted light C. Transmitted light are polarized. D. Transmitted light oscillates in all direction. 7. On rotating the analyzer if the intensity of light rays coming out of it varies from maximum to zero. What happens to the incident beam of light? A. unpolarized B. plane polarized C. partially polarized D. polarized 8. Three polarized are placed such that, the first and the third are mutually perpendicular to each other. Unpolarized light of intensity Io is incident or first polarized. The intensity of light emerging from the third polaroid's is (1/16) of the intensity of incident light. What is the angle between first the angle between first and second polaroid? A. a= 24.50 B. a= 25.6° Ca= 30.50 D. a= 31.50 9. The use of two filters, one can completely block all of the light that is incident upon'the set. What should be the orientation of the polarization axes? A. Parallel to each other C. Opposite to each other D. near each other B. perpendicular to each other.
Transcribed Image Text:1. As per Faraday's laws of electromagnetic induction, an emf is induced in a conductor whenever it A. lies perpendicular to the magnetic flux. B. lies in a magnetic field. C. cuts magnetic flux. D. moves parallel to the direction of the magnetic fielc 2. When current runs through a wire, a magnetic field is created. However, computer cables create little to no magnetic field external to their insulation. How is this possible? (Hint: computer cables contain multiple wires inside) A. The cables are insulated with plastic. B. The supply and return cables run anti parallel and their magnetic fields essentially cancel out. C. The supply and return cables run parallel and their magnetic fields essentially cancel out. D. The currents are too small to create a significant magnetic field. 3. A square loop of wire with 10 turns and a side length of 1 m is placed in a changing magnetic field. If the magnetic field changes from 2 T to 4 T within 8 seconds, what is the average induced emf? A. 1.25 V В. 2.5 V C. O V D. 5 V 4. A 500-turn solenoid develops an average induced voltage of 60 V. Over what time iterval must a flux change by 0.06 Wb occur to produce such a voltage? B. 0.1 s A. 0.01 s C 0.5 s D. 5 s 5. A current may be induced in a coil by A. moving one end of the bar through the coil. B. moving the coil toward the one end of the bar magnet. C. holding the coil near a second coil while the electric current in the second. D. all of the above. 6. What happens when two polarizing filters are placed so that their axes of polarization. Are perpendicular to each other? A. Transmitted light is slightly weaker B. There is no transmitted light C. Transmitted light are polarized. D. Transmitted light oscillates in all direction. 7. On rotating the analyzer if the intensity of light rays coming out of it varies from maximum to zero. What happens to the incident beam of light? A. unpolarized B. plane polarized C. partially polarized D. polarized 8. Three polarized are placed such that, the first and the third are mutually perpendicular to each other. Unpolarized light of intensity Io is incident or first polarized. The intensity of light emerging from the third polaroid's is (1/16) of the intensity of incident light. What is the angle between first the angle between first and second polaroid? A. a= 24.50 B. a= 25.6° Ca= 30.50 D. a= 31.50 9. The use of two filters, one can completely block all of the light that is incident upon'the set. What should be the orientation of the polarization axes? A. Parallel to each other C. Opposite to each other D. near each other B. perpendicular to each other.
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