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Q. Working of On - off hook circuit in telephone hand set?
On/off hook circuit (sometimes termed as a switch hook) is nothing more than a simple single-throw, double-pole (STDP) switch placed across tip and ring. Switch is mechanically connected to telephone handset so that when telephone is idle (on hook), switch is open. When telephone is in use (off hook), switch is closed completing and electrical path through microphone between tip and ring of local loop.
Var Compensators Employing Flexible AC Transmission System Devices These are a new generation of VAr compensators which employ solid-state devices (thyristors) for the generati
Note transducers convert a physical quantity from one form to another. The case below illustrates a typical moving coil meter that converts a current into a mechanical a
i need to submit a still model or a working model on science day(28 February). can you help me....
how to upload the program on proteus soft ware by using personal computer?
1. (a) Consider a sinusoidal signal m(t) = A cos(2 Π f m t) applied to a delta modulator with step size . Determine the range of the step size so that slope overload will be avoide
Q. A rotating electric machine with uniform air gap has a cylindrical rotor winding with inductance L 2 =1 H and a stator winding with inductance L 1 =3H. Themutual inductance va
What are the modes used in keyboard modes? 1. Scanned Keyboard mode with 2 Key Lockout. 2. Scanned Keyboard particular Error Mode. 3. Scanned Keyboard with N-key Rollover
Q. A practical voltage source is represented by an ideal voltage source of 30 V along with a series internal source resistance of 1.2 . Compute the smallest load resistance that c
DC chopper This is one stage conversion device which is used for direct conversion of fixed de voltage at a level to an adjustable dc voltage at another level.
For a vehicle suspension, a basic two-degree-of-freedom "quarter-car" model would be slightly more complicated than the spring-mass-damper system I chose to study in Figure 1. The
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