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Q. A separately excited dc generator with an armature-circuit resistance Ra is operating at a terminal voltage Vt, while delivering an armature current Ia, and has a constant loss Pc. Find the value of Ia for which the generator efficiency is a maximum.
Q. Explain the theory of thermal runaway? The maximum average power Pdmax which a transistor can dissipate depends upon the transistor construction and may lie in the
Q. (a) In the circuit shown in Figure the zener diode (with zero zener resistance) operates in its reverse breakdown region while the voltage across it is held constant at VZ and t
an 8 bit successive approximation adc has a resolution of 20mv. what will be its ouput analogue input of 2.17v
Q. How do you calculate the insulation resistance of transformer and what is the minimum value? Ans. The insulation resistance of the transformer will be calculated by using
A three-phase, 220-V, 60-Hz, four-pole, wye connected induction motor has a per-phase stator resistance of 0.5 . The following no-load and blocked rotor test data on the motor are
Find the transmission bandwidth required of a data telemetry system that is to handle three different signals with bandwidths W 1 = 1 kHz, W 2 = 2 kHz, and W 3 = 3 kHz, by emplo
Covalent Bonding Exhibited through the diamond lattice semiconductors. Each atom enclosed by four nearest neighbors, each comprising four electrons in the outermost orbi
Q. A 100-kW, 230-V, dc shunt generator, with R a = 0.05 , and R f = 57.5 has no-load rotational loss (friction, windage, and core loss) of 1.8 kW. Compute: (a) The generato
Q. A balanced electrical industrial plant load of 9.8 MW with 0.8 lagging power factor is supplied by a three-phase 60-Hz system having a maximum rating (load-carrying capacity) of
Static scherbius Drive By using this scheme, below and above synchronous speed can be obtained for an induction motor. There are two possible configurations to obtain s
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