Electromagnetism

Electromagnetism
The production of induced current in one coil due to production of current in neighboring coil is
electromagnetism
induction
mutual induction
steady current
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Electromagnetism
An ideal transformer dissipates
unit power
infinite power
zero power
limited power
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Electromagnetism
When a current passes through a conductor, it produces
electric field
magnetic field
electromagnetic field
mechanical field
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Electromagnetism
In a D.C motor the coil in a magnet rotates maximum to about
180 °
150 °
90 °
50 °
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Electromagnetism
To control a large current with the help of a small current, we use the
relay
fuse
breaker
transformer
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Electromagnetism
In a practical electric motor, the coil is called
armature
ammeter
pole
split
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Electromagnetism
The direction of the force on a current-carrying wire in a magnetic field can be found by using
left hand grip rule
right hand grip rule
Fleming’s left hand rule
Fleming’s right hand rule
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Electromagnetism
The simple coil placed in a magnet can not rotate more than
30 °
45 °
90 °
60 °
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Electromagnetism
If a transformer is used to supply voltage to a 15 V model train which draws a current of 0.7 A. If the voltage of the A.C source is 210 V, the current in the primary should be
0.04 A
0.05 A
0.03 A
0.02 A
Author: rikazzz Comment
Electromagnetism
A coil of wire consisting of many loops is known as
magnet
solenoid
photon
pole
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