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PPSC Physics Chapter 6 Electricity and Magnetism MCQs With Answers
Question # 1
If a charged body is moved against the electric field it will gain.
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P.E
K.E.
Electrical P.E.
Gravitational energy
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Question # 2
The basic quantity used to describe the state of magnetization of a substance is the
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Magnetic strength
Magnetic susceptibility
Magnetic moment
Magnetic moment per unit volume
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Question # 3
When a positive charge is allowed to move from positive to negative plate, then it will gain
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P.E.
K.E
Gravitational energy
Electrical P.E.
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Question # 4
The electric heater takes a current of 4 A from a 250 V supply . How long would it take the heater to convert 400,000 J of electric energy.
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100 s
200 s
400 s
750 s
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Question # 5
Which of the following is an electrical insulator that can be polarized by an applied electric field.
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Conductor
Condenser
Di electric
Capacitor
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Question # 6
If a person winds a coil of wire around a steel rod and then passes an electric current through the wire then the
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Steel rod becomes an electromagnet
Steel rod becomes hot
Wire becomes magnetized
wire becomes demagnetized
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Question # 7
The electric supply line in houses works at 220 V what will be the amplitude of emf.
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120 V
331 V
220 V
440 V
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Question # 8
The magnitude of induced emf during electromagnetic induction is controlled by.
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Magnetic flux
electric flux
Electric field
Magnetic field
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Question # 9
A charged capacitor has charge on its
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Outside surface
Inner surface
Surroundings
Mid point
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Question # 10
What is the value of earth's magnetics fields.
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5 G
50 G
100 G
500 G
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Question # 11
Pure silicon has valence electrons
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1
2
3
4
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Question # 12
The direction of electric field line surround the test charge -q id
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Parallel
Perpendicular
Radially outward
Radially inward
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Question # 13
Which of the following material could be used for a high vacuum, high voltage tube.
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Thoriated tungsten
Tungsten
Copper
Cesium
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Question # 14
Which of the following is an example of induced magnetism.
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A compass needle pointing north
A north pole attracting iron filings
A northpole repelling a north pole
The coil of a motor turning in a magnetic field.
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Question # 15
The building up of electric charge on the surface of objects is termed as.
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Static electricity
Electric charge
Electric current
Electrostatic induction
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Question # 16
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 # 17
In order to measure the true emf of an electrolytic cell it is necessary that.
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The measurement be made while charging the cell
No current be drawn from the cell
The cell be connected into a type circuit
The cell be connected into a parallel type circuit
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Question # 18
A voltmeter is a
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High resistance galvanometer
Low resistance galvanometer
Zero resistance galvanometer
Infinite resistance galvanometer
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Question # 19
Which material has the highest magnetic susceptibility.
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Steel
Brass
Iron
Wood
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Question # 20
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 # 21
If the current in a wire which is placed perpendicular to a magnetic fields increases the force on the wire.
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Increases
Decreases
Remain the same
Will be zero
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