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Chapter 20 - Electromagnetism - 3
1.
Left hand rule, to determine the direction of force on the conductor was given by the scientist.
a) Faraday
b) Newton
c) Pascal
d) Fleming
2.
The number of magnetic lines of force passing through a certain surface is known as the
a) Magnetic flux through that surface
b) Electric flux through that surface
c) Self induction of that surface
d) Mutual induction of that surface
3.
A transformer has 100 turns in its primary coil and 500 in the secondary. If 6 volts DC is applied across its primary, the voltage induced across its secondary would be
a) 0 volts
b) 30 volts
c) 45 volts
d) 60 volts
4.
Match the column...............................conductor
a) coil
b) thumb
c) north and south
d) current
5.
Match the column...............................number of turns
a) coil
b) thumb
c) north and south
d) current
6.
Match the column...............................lines of force
a) current
b) compass
c) coil
d) thumb
7.
Match the column...............................polarity of a magnet
a) coil
b) thumb
c) north and south
d) current
8.
Match the column...............................direction of force
a) coil
b) thumb
c) north and south
d) compass
9.
Match the column...............................two equal but opposite forces
a) battery
b) deflection of needle
c) 90 degree angle
d) couple
10.
Match the column...............................supply of current
a) battery
b) deflection of needle
c) 90 degree angle
d) couple
11.
Match the column...............................generation of emf
a) battery
b) deflection of needle
c) 90 degree angle
d) couple
12.
Match the column...............................value of the induced emf
a) deflection of needle
b) 90 degree angle
c) couple
d) rate of change of flux
13.
Match the column...............................right
a) battery
b) deflection of needle
c) 90 degree angle
d) couple
14.
Match the column...............................perpendicular to plane
a) carbon brushes
b) outward of plane
c) directionof the current
d) direction of the force
15.
Match the column...............................curling the fingures
a) carbon brushes
b) outward of plane
c) direction of the current
d) direction of the force
16.
Match the column...............................fleming left hand rule
a) carbon brushes
b) outward of plane
c) direction of the current
d) direction of the force
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