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PPSC Physics Chapter 6 Electricity and Magnetism MCQs With Answers
Question # 1
Ohm's law is applicable to
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Ohmic and non ohmic devices only
Semiconductors only
Metals only
Insulators only
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Question # 2
Five joules of work is needed to shift 10 C of charge from one place to another The potential difference between the places is.
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0.5 V
2 V
5 V
10 V
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Question # 3
An electric Heater and a fan are marked 1000 W, 250 V and 100 W , 220 V respectively The resistance of fan is.
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Equal to that of heater
Greater than that of heater
Less than that of heater
Zero
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Question # 4
What information is given by the tangent to a field that point of electric field.
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Magnitude
Direction
Proper unit
Dimensions
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Question # 5
Which of the following materials has highest magnetic suscaptibility.
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Uranium
aluminium
Platinum
Sodium
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Question # 6
If the output voltage is not smooth but pulsating then it can be made smooth by using a circuit known as.
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Filter
Gate
shunt
Fuse
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Question # 7
What happens to the energy of a charged condenser is plate separation is increased.
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It decreases
It increases
It becomes zero
It remains unchanged
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Question # 8
The internal resistance of a primary cell depends upon the.
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Current dawn form the cell
Concentration of the solution
distance between cell electrodes
All of the above
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Question # 9
The permeability of a diamagnetic material is
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Greater than unity
Less than unity
Equal to unity
Zero
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Question # 10
What happens to a soap bubble, when some charge is given to it.
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It collapses
It increases in size
It decreases in size
It feels nothing
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Question # 11
The current passing through the switch s will be
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Zero
3 A
4.5 A
10 A
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Question # 12
If the source of emf is traversed from negative to positive terminal the potential charge.
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Is negative
Is positive
Is zero
Remain the same
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Question # 13
The SI unit of mutual induction a
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Vs-1 A-1
V m -1 A-1
Henry
Tesla
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Question # 14
The circuit of full wave rectification consists of
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Only one diode
Two diodes
Three diodes
Four diodes
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Question # 15
Which one of the following materials has negative temperature coefficient.
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Conductors
Semiconductors
Insulators
Covalent bonds
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Question # 16
A dry battery can deliver 3,000 J energy to a small 2 W electric motor before the battery is exhausted for how minutes does the motor run.
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20 minutes
25 minutes
75 minutes
125 minutes
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Question # 17
Which one of the following is diamagnetic
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Air
Water
Copper sulphate
Liquid oxygen
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Question # 18
The cathode ray oscilloscope is used
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For viewing the wave shape of rapidly changing electric current
As voltmeter
For measuring time intervals between electricalimpulses
All of the above
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Question # 19
Super conductor are used in
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Fast computer chips
Magnetic resonance imaging
Magnetic levitation trains
All of the above
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Question # 20
The permittivity of a medium.
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Is a measure of the density
Is equal to unity for air
Depends on the charge derisory of the medium
Determines the magnitude of an electric field that can be established by the medium
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Question # 21
The susceptibility of a paramagnetic material is
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negative
Positive
Zero
Infinity
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