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Wireman
MAGNETISM AND CAPACITOR
Set 1
Set 1
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Q14093
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Which is dia magnetic substance?
A
Iron and nickel
B
Aluminium
C
Graphite
D
Copper
Q14094
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What is the metal composition of Permalloy?
A
Iron and nickel
B
Iron and copper
C
Iron and aluminium
D
Iron and chromium
Q14095
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What is the unit of permeability?
A
Weber/metre
B
No unit (mere number)
C
Ampere turns/web
D
Ampere turns/metre<sup>2</sup>
Q14096
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Which factor depends on the permeability of the material?
A
Length
B
Flux density
C
Field intensity
D
Magneto motive force
Q14097
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Which rule is used to find the direction of the self induced emf in a coil?
A
Clock rule
B
Lenz law
C
Ampere rule
D
Corkscrew rule
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