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WorksheetsSP025 Magnetism
Total questions: 20
Worksheet time: 14mins
The figure shows the structure of a motor. Which of the following will not affect the speed of rotation of the motor?
The current in the coil
Strength of the magnetic field
The number of turns of wire in the coil
The direction of the current in the coil
What does the following represent?
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗⊗
Multiplied by a billion
A piece of modern art
Uniform magnetic field directed into the page
Uniform magnetic field directed out of the page
Name one factor that does not affect the size of a force in on a current-carrying conductor placed in a magnetic field?
Gravity
Magnetic flux density/size of magnetic field
Size of the current
Length of the conductor
A current carrying wire lies between the poles of
two magnets, as shown. What is the direction of the force on the wire?
Into the page
Out of the page
Towards the N-pole
To the right
1) A straight wire carries a current inside the paper. What is the direction of the magnetic field at point P?
Points to the right
Points to the left
Points to the top of the page
Points to the bottom of the page
An electric current 𝐼 passes through a wire with a semicircular section of radius 𝑎 as shown below. What is the direction of the magnetic field at the point P?
Out of the page
Into the page
upward
downward
Two long, parallel wires each carry the same current 𝐼 in the same direction. What is the total magnetic field at the point 𝑃 midway between the wires?
Zero
Directed into the page
Directed out of the page
Directed to the left
In what direction is the electric current flowing according to right hand rule 2?
Up
Down
Left
Right
In the diagram above, a wire carrying an electron current into the page, as denoted by X, is placed in a magnetic field. The magnetic field exerts a force on the wire toward point
A
B
C
D
Describe the direction the charge gets deflected at in the diagram above
out of the page
into the page
left
right
Describe the direction the charge gets deflected at in the diagram above
out of the page
into the page
left
right
Describe the direction the charge gets deflected at in the diagram above
up
down
into the page
no deflection
What happens if you hold the south pole of one magnet close to the north pole of another magnet?
They will attract each other
They will repel each other
They will grow very hot
Nothing will happen
How can a wire become magnetic?
point it north
add a resistor
heat it up
run a current through it
What angle must there be between a magnetic field and a conductor in order for the maximum force to be exerted?
180
45
90
270
Two parallel wires of length 2 m are separated by 40 cm. If the magnetic force between the two wires is 2 ×10^-6 N and the current in the second wire is twice the current in the first one.
1) Which of the following is true concerning the force between the two wires:
The magnetic force is a repulsion between wires
The magnetic force is an attraction between the wires
