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Electromagnetism
If we apply the law of conversion of energy to electromagnetic induction, the electrical energy induced in a conductor comes from the
potential energy
heat energy
kinetic energy
mechanical energy
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Electromagnetism
If we grip the coil with our right hand by curling our fingers in the direction of the conventional current, our thumb will indicate the coil’s
west pole
south pole
east pole
north pole
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Electromagnetism
A device that converts electric energy into rotational kinetic energy is called
circuit breaker
transformer
generator
electric motor
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Electromagnetism
The magnetic field produced near the current-carrying conductor is
stronger
weaker
neutral
none of above
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Electromagnetism
The total force acting on the armature can be increased by increasing the
coil’s current
number of turns of coil
area of coil
all of above
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rikazzz
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Electromagnetism
The electric power delivered to the secondary circuit is equal to the power supplied to the primary circuit in a/an
ideal transformer
step-down transformer
step-up transformer
negative transformer
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rikazzz
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Electromagnetism
As per Michael Faraday, the force is increased if the
current in the wire is increased
magnetic field’s strength increased
length of wire increased
all of above
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rikazzz
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Electromagnetism
When a current passes through a conductor, it produces a magnetic field around it. This is discovered by
Faraday
Ampere
Fleming
Johns Burge
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Electromagnetism
A high voltage transformer can reduce the voltage keeping the power
low
high
zero
constant
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Electromagnetism
If the current in one coil becomes steady then magnetic field lines become
zero
constant
less than before
more than before
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