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Online Tests
Physics Fsc Part 2 Chapter 2 Online Test MCQs With Answers
Question # 1
Potentiometer is used to.
Choose an answer
Compare emf of two cells
Detect internal resistance of cell
Measure P.D.
All of these
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Question # 2
Magnetic effect of current is used
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To detect a current
To measure a current
In electric motor
All of above
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Question # 3
If there is no fourth band, tolerance is shows as
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10%
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Question # 4
Thermosouple is an arrangement of two different metals:
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Two convert heat energy into electrical energy
To produce more heat
To convert heat energy into chemical energy
To convert electrical energy into heat energy
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Question # 5
For ohmic device the graph between V and I is.
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A straight line
Curve
Hyperbola
Parabola
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Question # 6
The condition for the wheatstone bridge to be balanced is given by
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None of above
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Question # 7
A certain wire has a resistance R, the resistivity of an other wire of an identical material with the first, except for twice its diameter is.
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1/4 R
4R
2R
Same as R
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Question # 8
106 electrons are moving through a wire per second the current developed is:
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1.6 x 10-19 A
1 A
1.6 x 10-13A
106 A
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Question # 9
If 1 x 10
7
electrons passes through a conductor in 1.0 micro second , then the current is.
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2 A
1.6 A
2.6 x 10
-6
A
1.6 x 10
-6
A
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Question # 10
Drift velocity of electrons is.
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10
-1
m/s
10
-2
m/s
10
-3
m/s
10
3
m/s
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Question # 11
The value of maximum output power is?
Choose an answer
E/4R
E
2
/4R
E/4R
2
Non of above
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Question # 12
Three resistors of resistance R each are combined in various ways, Which of the following cannot be obtained?
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3 RΩ
2R /4Ω
R/3Ω
2R /3Ω
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Question # 13
A charged conductor has charge on its.
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Inner surface
Outer surface
Middle surface
Surrounding space
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Question # 14
An ideal current source shall have resistance
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Zero
Finite but not zero
Infinite
Depend upon requirement
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Question # 15
The thermistors convert changes of temperature into.
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Light energy
Electric voltage
Heat
Sound
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Question # 16
Heat energy is converted into electrical energy.
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Solar cells
thermocouples
Electric generators
None of above
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Question # 17
If a charge Q flows through any cross section of the conductor in time t, the current I is
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I=Qt
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Question # 18
The head produced by the passage of current through a resistor is.
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H= I
2
Rt
H = IR
2
t
H = 1/Rt
H = I
2
/Rt
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