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Magnetism and Electromagnetism

Magnetism and Electromagnetism
Magnetising steel is normals difficult because

it corrodes easily
it has high specific gravity
it has low permeability
it has high permeability

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Magnetism and Electromagnetism
The susceptibility of paramagnetic materials generally lies between

10"2 and KT5
1CT3 and 1CT7
KT3 and 1CT6
KT4 and KT8

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

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

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Magnetism and Electromagnetism
A square cross-sectional magnet has a pole strength of 1 x 10 Wb and cross sectional area of 20 mm x 20 mm. What is the strength at a distance of 100 mm from the unit pole in air ?

63380 N/Wb
6338 N/Wb
63.38 N/Wb
633.8 N/Wb

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Magnetism and Electromagnetism
Which of the following is not a unit of flux?

Tesla
Weber
All of the listed here
Maxwell

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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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