Question and answer
A transformer transforms A. magnetic field lines. B. generators into motors. C. voltage. D. unsafe forms of energy into safe forms.
Answer: (C) Voltage A transformer transforms one level of voltage and current into another.
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User: A transformer transforms A. magnetic field lines. B. generators into motors. C. voltage. D. unsafe forms of energy into safe forms.

Weegy: Answer: (C) Voltage A transformer transforms one level of voltage and current into another.
anc|Points 70|

User: Cross-country power lines carry voltages of about A. 60 V. B. 120 V. C. 2200 V. D. 120,000 V

Weegy: Cross-country power lines carry voltages of about D. 120,000 V.
drsyed19|Points 470|

User: A step-up transformer has a ratio of 1:10. If 200 W of power goes into the primary coil, the power coming from the secondary coil is approximately A. 2 W. B. 20 W. C. 200 W. D. 2000 W. E. more than 2000 W.

Weegy: D. 2000 W.
japs2310qa|Points 1939|

User: You are trying to design a motor for a hair dryer manufacturer. For the motor to work properly, a wire must be deflected upward. Which of the following principles could be used to produce this motor effect? A. Moving charges experience a force that is perpendicular to both their motion and the electric field they traverse. B. Moving charges experience a force that is parallel to both their motion and the electric field they traverse. C. Moving charges experience a force that is perpendicular to both their motion and the magnetic field they traverse. D. Moving charges experience a force that is parallel to both their motion and the magnetic field they traverse.

Weegy: C. Moving charges experience a force that is perpendicular to both their motion and the magnetic field they traverse.
paral|Points 2704|

User: Which of the following is NOT true of electromagnetic waves? A. An electric field is created in any region of space in which a magnetic field is changing with time. B. A magnetic field is created in any region of space in which an electric field is changing with time. C. Induction of electric fields by changing magnetic fields occurs only if a conducting material is present. D. Induction of magnetic fields by changing magnetic fields occurs even in the absence of a conducting material.







Weegy: the answer is A. [ An electric field is created in any region of space in which a magnetic field is changing with time. For reference An electric field is the region of space surrounding electrically charged particles and time-varying magnetic fields. The electric field depicts the force exerted on other electrically charged objects by the electrically charged particle the field is surrounding. The concept of an electric field was introduced by Michael Faraday. ]
Expert answered|rameshn|Points 30|

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Asked 10/6/2012 10:30:42 PM
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