What is produced when a current flows through a wire?
0%
Voltage
0%
Magnetic field
0%
Mass
0%
Neutrons
Q.2.
Which of the following is an application of an electromagnet?
0%
Crane for lifting steel/iron
0%
Drum set
0%
Light switch
0%
PC mouse
Q.3.
How can the force applied to a current carrying wire be increased?
0%
Increase magnetic field
0%
Decrease magnetic field
0%
Both increase and decrease magnetic field
0%
Neither increase nor decrease magnetic field
Q.4.
Another way to increase the force is to …
0%
decrease the current
0%
reverse the current
0%
keep the current the same
0%
increase the current
Q.5.
An electrical conductor will not experience a force in a circuit if it is placed in what position relative to the magnetic field?
0%
Parallel
0%
Perpendicular
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At 45 degrees to the field
0%
At 120 degrees to the field
Q.6.
How can the force experienced by a current carrying wire be reversed?
0%
Reverse direction of current/magnetic field
0%
Increase the current above a threshold point
0%
Decrease the current below a threshold point
0%
You cannot reverse the force felt by a wire
Q.7.
Fleming's left hand rule can be used to work out the direction of movement (force), magnetic field and current. What does the thumb represent in this rule?
0%
Nothing
0%
Field
0%
Current
0%
Movement (force)
Q.8.
What is used to transfer an electrical current to a loop of wire sitting in a magnetic field, in a motor?
0%
Communicator
0%
Commutator
0%
Commentator
0%
Conductor
Q.9.
Revisiting Fleming's left hand rule, the current is represented by …
0%
the thumb
0%
the little finger
0%
second (middle) finger
0%
first finger
Q.10.
What is the direction of the magnetic field relative to the current in a current carrying wire?
0%
Parallel
0%
Perpendicular
0%
Parallel and perpendicular
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The magnetic field in a current carrying wire cannot be measured
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