What happens when we place a wire carrying an elec
It will experience a force called the 'motor effect'
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When is this force at a maximum?
When the wire is at an angle of 90 degrees to the magnetic field
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When is the force at 0?
When the wifre is parallel to the magnetic field
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How can the size of the force be increased?
By increasing the strength of the magnetic field
By increasing the size of the current
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When is the direction of force on the wire reverse
If either the direction of the current or the direction of the magnetic field is reversed
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In a simple electric motor, how is the speed of th
By increasing the size of the current
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In an electric motor, how is the direction of the
By reversing the direction of the current
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When current passes through the coil, why does it
Because a force acts on each side of the coil due to the motor effect
Because the force on one side of the coil is in the opposite direction to the force on the other side
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What does the 'split-ring commutator' do? What doe
It reverses the direction of the current around the coil every half turn. This means that because the sides swap over every half-turn, the coil is always pushed in the same direction
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