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Q. Consider themagnetic circuit of Figure. Let the cross-sectional area AC of the core, be
16 cm2 , the average length of the magnetic path in the core lC be 40 cm, the number of turns N of the excitation coil be 100 turns, and the relative permeability µr of the core be 50,000.
For a magnetic flux density of 1.5 T in the core, determine:
(a) The flux φ
(b) Total flux linkage λ(= Nφ).
(c) The current required through the coil.
(a) Describe why ordinary junction transistor is known as bipolar. (b) Describe working of NPN transistor as common Base configuration. Describe working of NPN transistor in
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