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Q. Consider the circuit shown in Figure.
(a) Given v(t) = 10e-t V, find the current source is(t) needed.
(b) Given i(t) = 10e-t A, find the voltage source v (t) needed.
Q. In a hundred-line exchange 24 two-motion selectors are used. Draw schematic you suggest for this exchange and illustrate its working. How many simultaneous calls can be made du
Q. For a part of the network shown in Figure, given that i 1 = 4A; i 3 (t) = 5e -t , and i 4 (t) = 10 cos 2t, find v 1 , v 2 , v 3 , v 4 , i 2 , and i 5 .
A 3 phase 400 volt(line to line) wye connected synchronous motor has Xs= 1 ohm per phase and a negligible armature resistance. The field current is so adjusted that the internal(in
Half-wave rectifier: A half-wave rectifier will just only give one peak per cycle and for this reason and other reasons is only employed in extremely small power supplies. A f
Starting Methods for Polyphase Induction Motors When high starting torques are required, a wound-rotor induction motor, with external resistances inserted in its rotor circuits
The devices in power system shown in Figure 2 have the following ratings: G1 : 100 MVA, 13.8 kV grounded Y, X” = 0.15 pu, X2 = 0.015 pu Xo = 0.05 pu G2 : 50 MVA, 20.0 kV grounded
Explain the Tap Changing Transformers? This is the most popular form of voltage control at all voltage levels. It is based on changing the turns ratio of the transformer, hence
Q. How do you differentiate between dual beam and dual trace oscilloscope? Sol. There are two separate vertical input channels A, B and these use separate attenuator and prea
What are the features used mode 1 in 8255? Two groups - group A and group B are available for stored data transfer. 1. Each group have one 8-bit data I/O port and one 4-bit
Q. The response v(t) of a linear system to a unit-step excitation i(t) is given by v(t) = (5 - 3e -t + 2e -2t ) u(t). Determine the transfer function H(s) = V (s)/I (s).
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