Describe briefly the effect of varying excitation upon the armature current and power factor of a 3- synchronous motor when the input power to the motor is kept constant.
ইলেকট্রিক্যাল এন্ড ইলেকট্রনিক্স ইঞ্জিনিয়ারিং (EEE)
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1.
Find currents I and I1 in the following circuit.
Find currents I and I1 in the following circuit.
2.
Determine the Thevenin's equivalent circuit at terminal X-Y of the following circuit.
Determine the Thevenin's equivalent circuit at terminal X-Y of the following circuit.
3.
State maximum power transfer theorem.
Maximum Power Transfer Theorem :
In electrical engineering, the maximum power transfer theorem states that, to obtain maximum external power from a power source with internal resistance, the resistance of the load must equal the resistance of the source as viewed from its output terminals.
4.
If the switch in the following circuit opens at t = 0, find v(t) for t≥ 0 and the initial energy stored in the capacitor.
If the switch in the following circuit opens at t = 0, find v(t) for t≥ 0 and the initial energy stored in the capacitor.
5.
Show that a series RL circuit is a low pass filter if the output is taken across the resistor. Calculate the cut-off frequency (fc) if L = 2 mH and R = 10 kΩ.
Show that a series RL circuit is a low pass filter if the output is taken across the resistor. Calculate the cut-off frequency (fc) if L = 2 mH and R = 10 kΩ.
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