Magnetism and Electromagnetism
When two ends of a circular uniform wire are joined to the terminals of a battery, the field at the center of the circle

will depend on the radius of the circle
will be zero
will be infinite
will depend on the amount of e.m.f. applied

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Magnetism and Electromagnetism
Out of the following statements, concerning an electric field, which statement is not true?

Unit field intensity in the exertion of a force of one newton on a charge of one coulomb
The electric field intensity at a point is numerically equal to the force exerted upon a charge placed at that point
An electric field is defined as a point in space at which an electric charge would experience a force
The electric intensity is a vector quantity

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Magnetism and Electromagnetism
The magnetomotive force is

The flow of an electric current
The sum of all currents embraced by one line of magnetic field
The voltage across the two ends of exciting coil
The passage of magnetic field through an exciting coil

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