Magnetic Effects of Current
Magnetic Effects of Current, Class 10th Quiz
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A positive charged particle emitted from nucleus alpha particle projected towards west is deflected towards north by magnetic field. The direction of magnetic field is?
South
East
Downwards
Upwards
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Which of the following is not the sources of direct current
Cell
Battery
D.C Generator
Motor
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A rectangular coil of copper wires is rotated in magnetic field. The direction of induced current changes once in each:
Two revolutions
One Revolution
Half Revolution
One fourth revolution
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Which of following correctly describe magmetic lines near a long wire?
Straight lines
Radial lines
Concentric circle centred on wire
Closed curved lines
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The device used for detecting electric current in a circuit is called
Generator
Galvanometer
Ammeter
Motor
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Which of following is based on electromagnetic induction
Galvanometer
Transformer
X rays
Voltmeter
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When coil is kept stationary relative to magnetic, the galvanometer gives deflection:
Maximum
Zero
Low
Constant
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Which among the following is used to find direction of magnetic field line around a current carrying straight conductor?
Amperes swimming rule
Fleming's right hand thumb rule
Fleming's left hand thumb rule
Faradays rule
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Magnitude of magnetic field around a current carrying conductor at any point is:
Directly proportional to intensity of electric current
Inversely proportional to the distance of conductor
Directly proportional to the distance of conductor
Both A & B
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To find the direction of deflection of compass needle due to magnetic field of current carrying conductor, we use
Amperes swimming rule
Fleming's right hand thumb rule
Fleming's left hand thumb rule
Faradays rule
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Which among the following produces strong magnetic field?
Permanent magnet
Natural magnet
Bar magnet
Electromagnet
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Which of the following correctly describes the magnetic field near a long straight wire?
The field consists of straight lines perpendicular to the wire
The field consists of straight lines parallel to the wire
The field consists of radial lines originating from the wire
The field consists of concentric circles centred on the wire
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The phenomenon of electromagnetic induction is
The process of charging a body
The process of generating magnetic field due to a current passing through a coil
Producing induced current in a coil due to relative motion between a magnet and the coil
The process of rotating a coil of an electric motor
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Which of following is responsible to reverse the direction of current in the armature coil?
Split rings
Brushes
Shaft
None of these
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The motion produced in the arms of armature coil in a Motor can be explained by applying:
Maxwells right hand thumb rule
Fleming's right hand rule
Fleming's left hand rule
Clock rule
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The speed of rotation of armature can be increased by:
Increasing the strength of current
Increasing the strength of magnetic field
Increasing the number of turns in the coil of armature
All of these.
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In an electric motor the direction of electric current and magnetic field are:
Parallel to each other
Mutually perpendicular to each other
Opposite to each other
None of these
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The current carrying conductor in a magnetic field experiences maximum force only :
When it is placed parallel to magnetic field
When it is placed perpendicular to magnetic field
When it is placed outside the magnetic field
None of these
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The force acting on the conductor placed in a magnetic field is proportional to the
Current flowing through the conductor
Length of conductor inside the magnetic field
Magnitude of the magnetic field
All of the above
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In kicking wire experiment done by Andre Ampere, the current, magnetic field and the direction of the force on the wire are:
Parallel to each other
Mutually at right angles to each other
Have no particular direction
None of these
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The direction of force on current carrying conductor in a magnetic field is given by
Maxwell’s right hand thumb rule
Flemings right hand rule
Fleming's left hand rule
Amperes swimming rule
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Which of following works on the principle of kicking wire experiment?
Electric Motor
AC generator
DC generator
None of the Above
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When we compare magnetic field lines of the solenoid with field pattern of cylindrical bar magnet. It is found that,
Magnetic field lines in both are identical
Magnetic field lines have different pattern
Current carrying solenoid behaves like a bar magnet with fixed polarities
Both A and C
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The magnetic field lines inside a solenoid is:
Uniform
Non uniform
Strong at Centre and Weak at Ends
Depends on A.C or D.C current
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The magnitude of magnetic field by the solenoid depends on,
Current flowing through the solenoid
Number of turns per unit length of solenoid
Material of the Solenoid
All of the Above
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Which of the following uses Split Rings?
D.C Motor
A.C Generator
D.C Generator
Both A and C
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Which statement among the following is False about magnetic field lines near a Bar magnet
They never cross each other
They flow from North to south pole outside the magnet
They are in form of Closed Curved lines
The are in form of concentric rings near the Poles
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Every current carrying conductor produces magnetic field, this phenomenon was discovered by:
Maxwell
Oersted
Faraday
Coulomb
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If the direction of electric current in a current carrying conductor is upwards, the direction of magnetic field lines will be:
Clock wise
Anticlockwise
Both A and B
Can’t be determined
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A magnet always attracts:
Copper
Aluminium
Steel
Another Magnet
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The most suitable material for making the core of an electromagnet is:
Soft Iron
Hard Iron
Steel
Graphite
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The force experienced by a current-carrying conductor placed in a magnetic field is the largest when the angle between the conductor and the magnetic field is:
45
60
90
180
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An electron enters a magnetic field at right angles to it as shown in the Figure.
Left
Right
Into the Page
Out of the Page
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The force exerted on a current-carrying wire placed in a magnetic field is zero when the angle between the wire and the direction of magnetic field is:
45
60
90
180
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The magnetic lines of force, inside a current carrying solenoid, are
along the axis and are parallel to each other
perpendicular to the axis and equidistance from each other
circular and they do not intersect each other
circular at the ends but they are parallel to the axis inside the solenoid.
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Which one of the following substances is the magnetic substances?
Mercury
Iron
Gold
Silver
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The laws of electromagnetic induction have been used in the construction of a
galvanometer
voltmeter
electric motor
generator
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An induced Current is produced when a magnet is inserted into a coil. The strength of the induced current is independent of the:
the strength of the magnet
number of turns of coil
the resistivity of the wire of the coil
speed with which the magnet is moved
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The Direction of Induced Current is determined by:
Fleming’s left hand rule
Fleming’s right hand rule
Maxwell’s rule
Ampere’s rule of swimming
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When a bar magnet is broken into two pieces?
we will have a single pole on each piece
each piece will have two like poles
each piece will have two unlike poles
each piece will be lose magnetism
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In an electric motor, the energy transformation is
from electrical to chemical
from chemical to light
from mechanical to electrical
from electrical to mechanical
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Earth wire carries
current
Voltage
No Current
Heat
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The Insulation of Live Wire is
Black
Red
Blue
Green
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There are Four points identified around a Bar magnet. Where will be the magnetic field strong
P
Q
R
S
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To avoid the risk of electric shock, which phenomenon is used
Galvanizing
Oxidizing
Earthing
Anodizing
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The most suitable material for making the core of an electromagnet is:
Iron
Steel
Aluminium
Soft Iron
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Assertion : The magnetic field produced by a current carrying solenoid is independent of its length and cross- section area. Reason : The magnetic field inside the solenoid is uniform.
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
Assertion (A) is true but reason (R) is false.
Assertion (A) is false but reason (R) is true.
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Assertion (A) : The poles of a magnet cannot be separated by breaking into two parts. Reason (R) : In nature magnetic monopoles do not exist.
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
Assertion (A) is true but reason (R) is false.
Assertion (A) is false but reason (R) is true.
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Assertion (A) : Electromagnets are made of soft iron. Reason (R) : The strenght of an electromagnet is increased by increasing the current flowing through the solenoid coil.
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
Assertion (A) is true but reason (R) is false.
Assertion (A) is false but reason (R) is true.
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Assertion(A): On changing the direction of flow of current through a straight conductor, the direction of a magnetic field around the conductor is reversed. Reason (R) : The direction of magnetic field around a conductor can be given in accordance with left hand thumb rule.
Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A).
Assertion (A) is true but reason (R) is false.
Assertion (A) is false but reason (R) is true.
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You got {number correct}/{number of questions} correct answers
40+/50 = Diamond
40-35 = Gold
34-30 = Silver
29-20 = Bronze
19-10 = Better Luck next time
Below 10= You need to work very hard