Secondary Coil |

someone pls help asap!? physics 10pts?

Saturday, September 3, 2011

I NEED HELP WITH THESE QUIZ QUESTIONS ASAP PLEASE Question 22 A step-down transformer used on an 800 V line has 100 turns on the primary. What is the emf produced on the secondary coil if the turns on it are 40 turns? 200 V 320 V 2000 V 4000 V Question 23 The maximum [...]

Electromagnetism Questions?

Thursday, June 16, 2011

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The scientist who first discovered a link between electricity and magnetism is a. Hans Oersted b. Albert Einstein c. Michael Faraday d. William Gilbert Which of the following is "not" a characteristic of a step-down transformer? a. There are fewer loops on the secondary coil than on the primary coil. b. It converts alternating current [...]

Chemistry/Physics question help please?

Saturday, May 21, 2011

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In a generator, the current produced in __________ when the loop is parallel to the surrounding magnetic field. a. zero current b. average c. very small d. at a maximum Describe how a step – down transformer works to reduce voltage. Use the vocabulary terms “primary coil,” “secondary coil” and “electromagnetic induction.” A __________ magnetic [...]

Anyone think that they could help with some science questions?

Friday, May 13, 2011

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8. A transformer has a primary coil with 500 turns and a secondary coil with 250 turns. If the output voltage is 240 volts, what is the input voltage? (1 point) 96 volts 120 volts 480 volts 500 volts 9. How are fossil fuels used to generate electrical energy? (1 point) Heat from burning fuel [...]

Magnet Questions. Five short mult. choice ones. Please help me? I give BA. (:?

Sunday, January 23, 2011

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Thanks in advance! 1. What is the concept called when the poles of an electromagnet flip? a. switching poles b. changing direction c. current d. transformer 2. Which of the following describes electromagnetic induction? a. using a magnet to create an electric current b. moving a loop of wire through a magnetic field to create [...]

Physics Exam help Please?

Saturday, October 23, 2010

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16) A coil with 150 turns and a cross-sectional area of 1.00m2 experiences a magnetic field whose strength increases by +0.65T in 1.80 s. The plane of the coil is perpendicular to the plane of the applied magnetic field. What is the induced emf in the coil? 54 V 0.36 V -27 V -54 V [...]

Easy 20 question multiple choice quiz if you're good at physics.?

Tuesday, September 28, 2010

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Please help I don’t know this stuff Question 1 Marks: 1 A step-up transformer increases Choose one answer. a. energy. b. power. c. both A and B d. none of the above Question 2 Marks: 1 A device that transforms electrical energy to mechanical energy is a Choose one answer. a. generator. b. transformer. c. [...]

constructing a uniform magnetic field with a transformer from a rhumkorf generator?

Friday, July 30, 2010

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hello thank you for reading this question, i have a iron cored dc-ac transformer (relies on interrupter to constantly break circuit to induce induction in secondary coil) a brief and crude diagram can be found here:http://img684.imageshack.us/img684/990/induct.jpg. What i wish to do with this extracted component from an inductorium is use it to create a magnetic [...]