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Online Tests
Ics Part 2 Physics Chapter 3 Test Online MCQs With Answers
Question # 1
e/m=
Choose an answer
v/Br
Br/V
VB/r
Vr/B
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Question # 2
The acceleration of an electron of mass m and charge e, moving with uniform speed v at right angles to a magnetic field of flux density B, is given by
Choose an answer
Bevm
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Question # 3
An electron enters the magnetic field at right angle from left, B is into paper. The electron will be deflected.
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upward
To ward right
Down ward
Toward left
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Question # 4
The e/m of a neutron is
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Less than electron
The same as electron
Zero
Greater than election
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Question # 5
μ
∘
(Ampere's constant) has value.
Choose an answer
4πx10
-7
WbA
-1
m
-1
4πx10
-17
Wbm
2
4πx10
7
WbA
-1
m
-1
4πx10-27 Wb/m
2
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Question # 6
CRO works by deflecting the beam of electron as they pass through
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Uniform magnetic field
Uniform electric field between two sets of parallel plates
Non-uniform magnetic field
None of these
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Question # 7
Two parallel wires carrying currents in the opposite direction.
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Repel each other
Attract each other
Have no effect upon each other
They cancel out their individual magnetic fields.
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Question # 8
Which one has the least resistance.
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Galvanometer
Ammeter
Ohm meter
Volta meter
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Question # 9
The galvanometer can be made sensitive by making the factor BAN/C
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Large
Small
Constant
Zero
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Question # 10
An ammeter is an electrical instrument which is used to measure.
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Voltage
Current
Resistance
None
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Question # 11
If an electron is prijected in a magnetic field with velocity V, it will experience a force
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Question # 12
Torque is produced in a current carrying coil when it is placed in a
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Magnetic field
Electric field
Gravitational field
Nuclear field
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Question # 13
A charged particle enters in a strong magnetic field its K.E.
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Remain constant
Increases
Decreases
Increases then decreases
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Question # 14
Write the SI unit of magnetic flux.
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Tesla
Weber
Weber m-2
Tesla m2
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Question # 15
In current carrying long solenoid the magnetic field produced does not depend upon.
Choose an answer
The radius of solenoid
Number of turns per unit length
Current flowing through solenoid
All of the above
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Question # 16
The effective way to increase the sensitivity of moving coil galvanometer is.
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Increase the area of coil
Increase the number of turn
Increase the magnetic field
Increase the value of constant C
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Question # 17
The vector sum of electric force and magnetic force is called:
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Deflecting force
Lorentz force
Newton force
Faraday's force
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Question # 18
Current passing through the coil of galvanometer
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CO/BAN
CoN /BA
NAB/CO
AN/BCO
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