A three-phase stepper motor must be capable of stepping in 10° increments For a particular application. How many poles must it have?
-
Solution
For the circuit shown below the equivalent inducttance Leq is __________.
-
Solution
In the circuit, the equivalent resistance seen by the inductor is __________.
-
Solution
How many different output status the following circuit is having?
-
Solution
The power dissipiated in 2 Ω resistor in the circuit figure is ____ W.
-
Solution
A fully charged mobile phone with a 12V battery is good for a 10 min talk time. Assume that, during the talk-time, the battery delivers a constant current 0.2A and its voltage drops linearly from 12V to 10V as shown in fig. How much energy (J) does the battery deliver during this talk-time?
-
Solution
The thyristor in figure has a latching current of 50 μA and is fired by a pulse of length 50 ms. The maximum value of the R to ensure firing of thyristor is
-
Solution
A three-phase, squirrel cage induction motor is developing torque of 1500 sync Watts at 50 Hz and 1440 rpm. If the motor frequency is now increased to 75 Hz using constant power mode, determine the new value of torque developed by mo-tor at constant slip.
A 1–φ controlled rectifier bridge consists of one SCR and three diodes as shown in figure. For an AC source voltage of 250 V, 50 Hz, and firing angle of 60°, the average output voltage in volt is ________.
-
Solution
The Nyquist plot of an open-loop stable system is shown in the figure below. If (–1, 0) point is as indicated in the given figure, then closed-loop system will be