10. Which of the following statements are true regarding transformers? Check all that apply. a) In...
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10. Which of the following statements are true regarding transformers? Check all that apply. a) In a transformer, the power input is less than the power output. b) In a transformer, if the secondary coil contains more loops than the primary coil, then it is a step-up transformer. c) A transformer converts mechanical energy into electrical energy. d) A transformer is used to increase or decrease a direct current voltage. e) A transformer is used to increase or decrease an alternating current voltage. 11. The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by B. What is the magnitude of the magnetic field at twice the distance from the conductor? a) at twice the distance, the magnitude of the field is 4B. b) at twice the distance, the magnitude of the field is 2B. c) At twice the distance, the magnitude of the field is B/2. d) At twice the distance, the magnitude of the field remains equal to B. e) At twice the distance, the magnitude of the field is B/4. 12. One wire carries a large current out of the plane of this page, while another carries a large current into the page. What is the direction of the magnetic field at point P? Ⓡ ↓ b) in e) none of the these 10. Which of the following statements are true regarding transformers? Check all that apply. a) In a transformer, the power input is less than the power output. b) In a transformer, if the secondary coil contains more loops than the primary coil, then it is a step-up transformer. c) A transformer converts mechanical energy into electrical energy. d) A transformer is used to increase or decrease a direct current voltage. e) A transformer is used to increase or decrease an alternating current voltage. 11. The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by B. What is the magnitude of the magnetic field at twice the distance from the conductor? a) at twice the distance, the magnitude of the field is 4B. b) at twice the distance, the magnitude of the field is 2B. c) At twice the distance, the magnitude of the field is B/2. d) At twice the distance, the magnitude of the field remains equal to B. e) At twice the distance, the magnitude of the field is B/4. 12. One wire carries a large current out of the plane of this page, while another carries a large current into the page. What is the direction of the magnetic field at point P? Ⓡ ↓ b) in e) none of the these
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Related Book For
Engineering Economy
ISBN: 978-0132554909
15th edition
Authors: William G. Sullivan, Elin M. Wicks, C. Patrick Koelling
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