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WorksheetsElectro magnetic induction
Total questions: 10
Worksheet time: 5mins
Name
Class
Date
1.
Electro motive force induced by motion of conductor across magnetic field is called
a)
EMF
b)
motional EMF
c)
rotational EMF
d)
static EMF
2.
The turn ratio (r) for a step-up transformer is
a)
r = 0
b)
r > 1
c)
r < 1
d)
r = 1
3.
According to the Lenz's law, if you pull the magnet away, then the induced current will
a)
change the pull
b)
go with pull
c)
oppose the pull
d)
both a and b
4.
Change of current of 1 A s-1 causes EMF of 1 V to be equal to
a)
1 H
b)
1 V m-1
c)
1 A
d)
1 J
5.
Lenz's law is in accordance with ------ law of conservation of
a)
momentum
b)
energy
c)
work
d)
magnetic field
6.
Self inductance is represented by the symbol
a)
L
b)
S
c)
I
d)
SI
7.
SI unit of Magnetic flux is
a)
Waber
b)
Weber
c)
Watt
d)
Tesla
8.
Name the following law: A moving magnet creates an opposing magnetic field.
a)
Ampere's Law
b)
Faraday's Law
c)
Lenz's Law
d)
Coulomb's Law
9.
Voltage can be induced in a wire by
a)
a. moving the wire near a magnet.
b)
b. moving a magnet near the wire.
c)
c. changing the current in a nearby wire.
d)
d. all of these
10.
___ Law says that the Induced current is proportional to the change of magnetic flux
a)
Lenz'
b)
Faraday's
c)
Ampere's
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