WorksheetsThe Magnetic Effect of a Current-carrying Conductor
Total questions: 13
Worksheet time: 13mins
Diagram shows a compass is placed horizontally on a piece of cardboard and it is initially points north.
When the current is switched on, the compass needle will ....
move to the west
move to the east
remain to the north
vibrate at the original positiion
Diagram shows two compasses M and N are placed surrounding a straight wire carrying a current.
What will happen to the compasses needle when switch S is turned on?
Both compasses will deflect 90° in an opposite direction.
Both compasses will deflect 90° in the same direction.
Both compasses will deflect 180°
Compass M will deflect 180° while compass N will remain at the same position.
Diagram shows a magnetic field pattern which is produced from an experiment. The magnetic field pattern is due to ...
coil
straight wire
solenoid
magnetic bar
Diagram shows a solenoid carrying current.
Which of the following shows the correct pattern and direction of the magnetic field produced.
The diagram shows an electromagnet PQR,
What is the magnetic polarity at P, Q and R?
P - North, Q - South, R - South
P - South, Q - North, R - North
P - South, Q - North, R - South
P - North, Q - South, R - North
Diagram shows a copper wire coiled round a U-shaped soft iron core. The copper wire is connected to a battery.
When the switch is turned on, the magnetic pole of X, Y and Z are ...
X - North, Y - North, Z - South
X - North, Y - South, Z - North
X - South, Y - North, Z - North
X - South, Y - North, Z - South
Diagram shows two iron core are coiled round with a wire.
What happen to A and B when current flows?
A and B are stationary
A and B are attract to each other
A and B repel at each other
A and B repel first, then attract
The diagram shows two iron nails are hung freely in a solenoid.
When the current flows through the solenoid, the nails will
be at their original position
attract to each other
repel at each other
oscillate with a constant velocity
Which of the following shows the correct polarity of the electromagnet?
Diagram shows the apparatus used to study the effect of an electromagnet.
Which change will increase the number of paper clips attracted to the iron rod?
Use a thinner wire to form the coils
Use a non-isulated wire to form the coils
Reduce the number of coils
Increase the magnitude of the current
Soft iron is used as the core of an electromagnet because
it is a good conductor of electricity
the melting point of iron is very high
It loses all its magnetism when the current is switched off
it retains all its magnetism when the current is switched off
The diagram shows an electromagnet.
Which factor does not influence the strength of electromagnet?
Material used for the wire
Material used for insulator of the wire
Number of turns of wire
Current flowing in the wire
The diagram shows an experiment to study the suitable type of core for an electromagnet. 4 different metal rod is put inside copper coils.
The table shows the number of paper clips attracted to the metal rod when switch is turned on and the turned off.
Which of the metal rods A, B, C and D is suitable to be used as the core of an electromagnet?
(a)
