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Electrical Bell:
1.An electromagnet, which is made by winding insulated copper wire on a soft iron core.
2.An armature which is soft iron strip with spring.
3.A soft iron with a small hammer at one end which strikes the gong and form sound.
4.Electric circuit having of
a) Push button b) A battery of potential difference V
c) Contact adjusting screw
Working:
1.When push is pressed, the circuit is finished and the armature is attracted towards the electro magnet.
2.With forward movement of armature, the spring is detached from the screw, the circuit is detached and electromagnet is demagnetized.
Determine the potential and field due to a short dipole of dipole moment 5.0 X 10 -16 coulomb-cm at a point distant 1 cm from it. (a) on its axis (b) on its perpendicular bi
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a) Sketch the small-signal equivalent circuit for a field-effect transistor (FET) and explain how it can be deduced from the properties of the real device. b) Draw the circuit
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