If girlfriend drop a bar magnet in a vertical copper pipeline it will autumn slowly becauseA. Of electron repulsion.B. The copper is a great conductor that both electricity and also magnetism.C. Of air resistance.D. It induces a magnetic ar in the pipe the resists motion of the magnet.


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Neon indicators require around 12,000 volts come operate. If the circuit supplies a 120-volt power source, the ratio of major to secondary turns on the transformer must beA. 1 major to 100 secondary.B. 100 main to 1 secondary.C. No of these
The output strength of suitable transformer isA. Higher than the input power.B. Equal to the intake power.C. Smaller than the input power.D. Might be any type of of these
A certain transformer doubles entry voltage. If the major coil color etc 10 A the current, then the existing in the second coil isA. 2 A.B. 5 A.C. 10 A.D. 25 A.E. None of these
An iron core in a transformerA. Reduces power losses.B. Separates the primary and second regions.C. Shields undesirable external electric or magnetic fields.D. Guides magnetic field lines.
Transformers usage ac to satisfy the requiredA. Change in magnetic ar for operation.B. Change in entry current.C. Voltage for transformation.D. Carry of energy from coil come coil.E. Magnetic field intensities.
An electric motor is very similar toA. An electric generator.B. An vehicle battery.C. A radio receiver.D. No one of these
Electromagnetic induction is employed inA. Electrical power lines.B. Triggering traffic lights.C. Hybrid automobiles.D. Mobile phones.E. Every one of these
The rate at which power is transferred isA. Power.B. Electromagnetic induction.C. Transformation.E. None of these
A transformer in reality transformsA. Voltage.B. Magnetic ar lines.C. Generators into motors.D. Non-safe develops of power to safe creates of energy.E. Every one of these
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Engineering Electromagnetics (Irwin electronic devices & computer Enginering)8th EditionJohn Buck, william Hayt


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