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Online Tests
Physics ECAT Pre Engineering Chapter 14 Electromagnetism Online Test MCQs With Answers
Question # 1
Charge to mass ratio (e/m) of an electron is given by the relation
Choose an answer
e/m = 2V/Br
2
e/m = 2V/B
2
r
e/m = 2V/B
2
r
2
e/m = V/2B
2
r
2
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Question # 2
When the charged particle is projected at right angles to the field, then experienced by it will be:
Choose an answer
Maximum
Zero
qvB
Both (A) and (B)
Both (A) and (C)
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Question # 3
A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called
Choose an answer
dead beat galvanometer
stable galvanometer
shunt galvanometer
sensitive galvanomter
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Question # 4
The SI unit of magnetic flux is
Choose an answer
NmA
-2
NmA
-1
NAm
-1
Nm
2
A
-1
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Question # 5
The unit of flux density is also given by
Choose an answer
Weber/m
2
or Wb . m
-2
Weber/mor Wb . m
Weber/mor Wb . m
-1
Weber or Wb
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Question # 6
Which one of the following relations is correct?
Choose an answer
1 Wb-m
2
= Nm
-1
A
-1
1 tesla = 104 gausses
1 Wb-m
2
= 1 tesla
All of the above
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Question # 7
Tesla is the unit of
Choose an answer
Magnetic induction or flux density
Magnetic flux
Self inductance
None of these
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Question # 8
41 The force experience, when proton projected in a magnetic field with velocity 'v' is
Choose an answer
+e(v x B)
-C(V x B)
+e
2
(v x B)
-e(v
2
x B)
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Question # 9
A charged particle moving at right angle to the magnetic field will experience
Choose an answer
minimum force
maximum force
zero
moderate force
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Question # 10
Magnetic flux and flux density are related by
Choose an answer
Flux density = flux x area
Flux density = flux / area
Flux density = flux - area
None of these
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Question # 11
Total number of turns on 0.15 m length solenoid is 300. the value of n is:
Choose an answer
Greater than 300
Smaller than 300
Equal to 300
Any of (A) or (B)
Any of (A) or(C)
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Question # 12
The SI unit of magnetic flux is.
Choose an answer
weber
Nm
-1
A
-1
tesla
gauss
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