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Magnetism and Electromagnetism

Magnetism and Electromagnetism
A coil of wire is placed in a changing magnetic field. If the number of turns in the coil is decreased, the voltage induced across the coil will

Decrease
Remain Constant
Increase
Be excessive

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Magnetism and Electromagnetism
The uniform magnetic field is

None of the listed here
The field in which all lines of magnetic flux are parallel and equidistant
The field of a single conductor
The field of a set of parallel conductors

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Magnetism and Electromagnetism
What is the magneto-motive force in a 75-turn coil of wire when there are 4 A of current through it?

150 At
300 At
200 At
100 At

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Magnetism and Electromagnetism
A basic one-loop dc generator is rotated at 90 rev/s. How many times each second does the dc output voltage peak (reach maximum)?

270
90
360
180

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Magnetism and Electromagnetism
In the left hand rule, forefinger always represents

current
magnetic field
direction of force on the conductor
Voltage

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Magnetism and Electromagnetism
Fleming's left hand rule is used to find

Polarity of a magnetic pole
Direction of magnetic field due to current carrying conductor
Direction of flux in a solenoid
Direction of force on a current carrying conductor in a magnetic field

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