In squirrel cage induction machine... a) The rotor mechanical speed is equal to the synchronous speed b) None of these c) The rotor current is a reaction to the current flowing the stator d) The stator magnetic field rotates at the synchronous speed

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Q: Find the inverse Laplace transform of: 2s+26 V(s) = 5(s² +48 +13)

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Q: 502 ww- 20Ω 30 2 12 V 15 Q 20 2 30 V ww 20 V 60, 80 2 ww

A: 150-400-8004065-301500-30500-20-8015095000-20080

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Q: 4 Find the convolution of the two sequences x(n) = 8(n – 2) – 28(n – 4) + 38(n – 6) - - h(n) 28(n +…

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Q: A 4-pole, 50 Hz, 3-phase induction motor has blocked rotor reactance per phase which is four times…

A: Types of induction motor  Squirrel cage Induction motor  Slip ring induction motor

Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.