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Magnetism and Electromagnetism

Magnetism and Electromagnetism
The unit of relative permeability is

Hennry
None of the listed here
Its dimensionless
Hennry/meter

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Magnetism and Electromagnetism
Paramagnetic materials have relative permeability

slightly more than unity
slightly less than unity
equal to unity
equal to that ferromagnetic mate rials

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Magnetism and Electromagnetism
The direction of a magnetic field within a magnet is

front to back
back to front
from north to south
from south to north

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Magnetism and Electromagnetism
The voltage induced across a certain coil is 200 mV. A 120 resistor is connected to the coil terminals. The induced current is

16 mA
12 mA
120 mA
1.7 mA

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Magnetism and Electromagnetism
Reciprocal of permeability is

Permeability
Reluctivity
conductance
Susceptibility

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

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