WorksheetsMagnetic effects of electric current
Total questions: 10
Worksheet time: 6mins
Refer the diagram. A wire carries a current, creating a magnetic field around itself as shown. The current in the wire is:
Directed to the right
Directed to the left
Equal to the magnetic field
n the same direction as the magnetic field
The relative strength of the magnetic field is shown by the degree of closeness of the field lines.
false
true
can't say
A wire is parallel to the lines of the force of the magnetic field and the current flows in the wire. Then
The wire will experience a force along the direction of the magnetic field
The wire will not experience any force
The wire will experience the torque
The wire will experience a perpendicular force
Identify the poles of the magnet in the given figure.
NORTH
SOUTH
One is north and the other is south
Can't predict
Which of the following diagrams correctly shows the magnetic field produced by a current- carrying wire?
A
B
C
D
The magnetic field lines due to a straight wire carrying a current are
straight
circular
parabolic
elliptical
According to right hand thumb rule the direction of magnetic field in a current carrying straight conductor is denoted by:
Thumb
Curl fingers
Middle finger
First finger
What is the shape of a magnetic field around a wire?
When the electric current in wire XY is in the direction shown, there is an upward force on the wire.
If the north and south poles of the magnet exchange positions, in which direction will the force on the wire act?
downwards
upwards
to the left
to the right
A student carries out an experiment to see the effect of a magnetic field on a wire carrying a current. The wire moves upwards as shown.
What should the student do to make the wire move downwards?
change the direction of the current
move the poles of the magnet closer together
send a smaller current through the wire
use a stronger magnet
