WorksheetsG10-Final
Total questions: 30
Worksheet time: 15mins
When a bar magnet is divided into smaller pieces, each piece:
Loses its magnetism
Has only one magnetic pole
Becomes a complete magnet
Turns into iron
A permanent magnet remains magnetized because:
External current flows through it
Its magnetic domains stay aligned
It constantly gains electrons
It is always moving
Which interaction occurs between two like magnetic poles?
Attraction
Repulsion
No force
Rotation
In an unmagnetized ferromagnetic material, the magnetic domains are:
Perfectly aligned
Randomly oriented
Electrically charged
Permanently fixed
Magnetization of a substance mainly occurs when its domains:
Stop moving
Cancel each other
Align in one direction
Reverse polarity
Which unit is used to measure magnetic field strength?
Newton
Joule
Tesla
Coulomb
Outside a magnet, magnetic field lines travel:
From south to north
From north to south
Randomly
In only circular paths
Magnetic force is classified as:
A frictional force
A contact force
A non-contact force
A gravitational force
Which material MOST likely attracted by a magnet?
Copper
Plastic
Iron
Glass
Which statement about electromagnets is correct?
They work without electricity
Their magnetic strength can be controlled
They attract all metals
They are always permanent
A solenoid is best described as:
A straight metal rod
A coiled wire connected to a power source
A permanent magnet
A metal plate
Wireless charging works because of:
Heat transfer
Magnetic induction
Electric conduction
Static electricity
Magnetic flux refers to:
Direction of current
Strength of electric field
Amount of magnetic field through an area
Speed of electrons
An electric motor mainly converts:
Mechanical energy into electrical energy
Electrical energy into mechanical energy
Chemical energy into heat
Magnetic energy into light
Increasing electric current in a wire will:
Decrease magnetic field
Have no effect
Increase magnetic field strength
Remove magnetism
Which law explains the magnetic field produced by a current?
Ohm’s Law
Coulomb’s Law
Biot–Savart Law
Newton’s Law
An electric current is induced in a loop when:
The loop is stationary
Temperature increases
Magnetic flux changes
Wire thickness increases
Lenz’s Law states that induced current:
Aids the change causing it
Opposes the change in magnetic flux
Has no direction
Always flows clockwise
The direction of force on a current-carrying conductor in a magnetic field is found using:
Right-hand grip rule
Fleming’s left-hand rule
Ohm’s rule
Faraday’s rule
The force on a current-carrying wire in a magnetic field is:
Parallel to the magnetic field
Parallel to the current
Perpendicular to both current and field
In a random direction
Alternating current is characterized by:
Flowing in one direction only
Constant magnitude
Changing direction with time
Zero voltage
What is magnetism?
Magnetism is a form of plant growth.
Magnetism is a type of musical instrument.
Magnetism is a type of weather phenomenon
Magnetism is a force that attracts or repels certain materials.
What are the two poles of a magnet called?
Top pole and Bottom pole
North pole and South pole
East pole and West pole
Positive pole and Negative pole
How does a compass align itself?
Radio waves
Earth's magnetic field
Gravity
Solar winds
What is magnetic induction?
Magnetic induction is the process of repelling magnetic fields.
Magnetic induction is the process of creating electricity using magnets.
Magnetic induction is the process of converting magnetic energy into heat.
Magnetic induction is the process by which a material becomes magnetized when exposed to a magnetic field.
Which of the following will generate a current in a conducting loop? Select two answers:
A bar magnet moving towards the loop.
A bar magnet remaining stationary within the loop.
The loop rotating on an axis perpendicular to the bar magnet.
A magnet and the loop moving to the right with the same velocity.
Law says that the Induced current is proportional to the change of magnetic flux
'
Lenz
Faraday's
Ampere's
No EMF is induced when?
When the wire is not moving
When the wire is parallel to magnetic field direction
When no lines are cut by the wire
all of the above
An increase in the magnetic field will result in a greater induced voltage.
TRUE
FALSE
What happens to a soft magnetic material when placed in a magnetic field?
It becomes permanently magnetised
It becomes temporarily magnetised
It changes colour
It breaks
