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WorksheetsMagnetic effects
Total questions: 15
Worksheet time: 5mins
The presence of magnetic field can be determined by a --------------------------
(a)
The shape of the earth's magnetic field resembles that of an imaginary:
(a)
The nature of magnetic field line passing through the center of a current carrying circular loop is a (a)
Force on a current carrying conductor in an external magnetic field depends on
magnetic field strength
current through the conductor
length of the coil
material of the conductor
Force on a current carrying conductor in a magnetic field is maximum when the current and the field are (a)
Only a change in magnetic field lines linked with a coil can induce current in the coil
True
False
When North pole approaches a coil, the front side of the coil will show __________ current.
Anticlockwise
Clockwise
Can't predict
In an electric motor, the direction of current in the coil changes once in each:
One-fourth rotation
Half rotation
One rotation
Doesn't change
Identify the poles of the magnet in the given figure.
NORTH
SOUTH
One is north and the other is south
Can't predict
A soft iron bar is inserted inside a current-carrying solenoid. The magnetic field inside the solenoid will
Increase
Decrease
Remains same
Becomes zero
The force exerted on a current carrying wire placed in a magnetic field is zero when the angle between wire and the direction of magnetic field is:
45o
60o
90o
180o
A positive charge is moving towards you. The direction of magnetic field lines as seen by you will be in
Clockwise direction
Anticlockwise direction
Vertically upward direction
Vertically downward direction
A coil of insulated copper wire is connected to a galvanometer forming a loop and a magnet is:
A: Held stationary
B: Moved away along its axis
C: Moved towards along its axis
There will be a induced current in:
A only
A and B only
B and C only
A, B and C
Which of the following diagrams correctly shows the magnetic field produced by a current- carrying wire?
A
B
C
D
When a magnet is moved with its north polarity towards a coil placed in a closed circuit, then the nearest face of the coil shows north polarity.
True
False
