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Athree-phase, 440-V, 60-Hz, four-pole induction motor operates at a slip of 0.025 at full load, with its rotor circuit short-circuited. This motor is to be operated on a 50-Hz supply so that the air-gap ?ux wave has the same amplitude at the same torque as on a 60-Hz supply. Determine the 50- Hz applied voltage and the slip atwhich themotor will develop a torque equal to its 60-Hz full-load value.
(a) Estimate the hysteresis loss at 60 Hz for a toroidal (doughnut-shaped) core of 300-mm mean diameter and a square cross section of 50mmby 50mm. The symmetrical hysteresis loop f
ohm''s law
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The very basic specifications of a UJT are: Vbb(max) - The maximum interbase voltage that can be applied to the UJT (b) Rbb-the interbase resistance of the UJT (c) n - The
For sign flag RP ( Return on Plus ) and RM ( Return on no minus ) Instructions RM returns from the subroutine to the calling program if sign flag is set (S=1). The in
Collection and Payment Systems Payments are currently made in person in most of the places. Only some places payments could be made on line or by the ATM (Automated Teller Mac
what is rom
Q Consider a three-phase, full-wave bridge recti?er, as shown in Figure, with a purely resistive load R. For each diode, determine: (i) efficiency, (ii) form factor, (iii) ripple f
Transmission And Distribution Losses - Electrical Energy Previously, you have learnt that there are inherent losses in transmission and distribution of electrical energy from
Q. Show the Enhancement operation of p-channel enhancement mosfet? As the gate terminal is insulated from the channel by the silicon dioxide layer, we can also apply a negative
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