WorksheetsDILIGENT SUMMATIVE
Total questions: 25
Worksheet time: 19mins
Which of the following materials is magnetic?
PLASTIC
GLASS
IRON
RUBBER
What do we call the region around a magnet where magnetic forces act?
ELECTRIC FIELD
MAGNETIC FIELD
GRAVITATIONAL FIELD
ENERGY ZONE
The ends of a magnet are called:
POLES
CHARGES
CURRENTS
DOMAINS
When like poles of magnets are brought together, they:
ATTRACT
REPEL
Magnetic field lines always flow from:
NORTH TO SOUTH
SOUTH TO NORTH
When like poles of magnets are brought together, they:
ATTRACT
REPEL
What happens when electric current passes through a coil of wire?
It becomes hot
It becomes an electromagnet
It stops flowing
It loses energy
Which part of a DC motor rotates when electricity flows?
Field Magnet
Armature
Commutator
Battery
The magnetic domains of an unmagnetized object are:
Aligned in one direction
Randomly arranged
Strongly Connected
What type of energy transformation occurs in an electric motor?
Electrical to Mechanical
Mechanical to Electrical
Which of the following devices uses an electromagnet?
Hair dryer
Refrigerator
Doorbell
It is the invisible pattern formed by magnetic field lines around a magnet.
(a)
The area within a magnet where groups of atoms align in the same direction.
(a)
Device that converts electrical energy into mechanical energy.
(a)
The two regions of a magnet with the strongest magnetic force.
(a)
The part of a DC motor that rotates when current flows through it.
(a)
This part of a DC motor reverses the current direction in the coil.
(a)
It is produced when electric current flows through a wire coil.
(a)
The law that states opposite poles attract and like poles repel.
(a)
These lines show the direction and strength of a magnetic field.
(a)
The source of the electric current in an electric motor.
(a)
Magnetic field lines cross each other at right angles.
TRUE
FALSE
The Earth itself acts like a giant magnet.
TRUE
FALSE
Electromagnets can be turned on and off.
TRUE
FALSE
In a DC motor, electrical energy is changed into sound energy.
TRUE
FALSE
