ECE :: Network Analysis and Synthesis
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In given figure the switch was closed for a long time before opening at t = 0. The voltage Vx at t = 0+ is
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S is open for a long time and steady state is reached S is closed at t = 0. Let iL the current in the inductor At t = 0+,
is given by
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In an air cored coil, a current of 0.7 A causes a flux of 5 x 10-6 Wb. If the core is made of cast iron and the coil is similar, the same current can set up a flux of about
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When cells having different emfs are connected in parallel, a circulating current flows.
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In a specimen of cast iron, a field strength of 400 AT/m cause a flux density of 0.6 T. In a specimen of silicon steel, the same value of H would cause B to be
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The circuit shown in figure, will act as an ideal current source with respect to terminals A and B, when frequency is
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The realization of a term
in the impedance function will give -
An RL admittance function can also be realized as
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In active filters inductances are divided because they
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50v, but in opposite to current source. Hence Vx = - 50v.
and Z4 is equal to
= 375 ∠ - 40 - 30.
