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A single phase a.c. generator supplies the following loads :
(i) Lighting load of 20 kW at unity power factor.
(ii) Induction motor load of 100 kW at p.f. 0.707 lagging.
(iii) Synchronous motor load of 50 kW at p.f. 0.9 leading.
Calculate the total kW and kVA delivered by the generator and the power factor at which it works.
A generator uses a coil that has 110 turns and a 0.475 T magnetic field. The frequency of this generator is 43.0 Hz, and its emf has an rms value of 230 V. Assuming that each turn of the coil is a square (an approximation), determine the length of..
The serial ports on two computers which use binary signaling are connected by a twisted pair cable. The cable has a flat frequency response up to 120KHz, with negligible group delay distortion. That is, the bandwidth of the cable is 120KHz.
Your embedded systems application requires you to implant a sensor in each of the taxiways of the airport and connect the sensor wires at the base of the ATC tower. The worst case distance is two miles.
Formulate the differential equation model for a motor having inductance L and rotational inertia J, and electrical resistance Rw and frictional resistance Rf, driving a frictional load, Rl.
If in an ideal op amp has no current coming out of the inverting terminal and the non-inverting terminal then shouldn't the current going through the 9k Ω resistor be equal to 1mA and also can't the 15k and 6k ohm resistor be combined in parallel
Briefl y explain the improvements introduced by GAL over the existing PAL and PLA devices. Why is GAL fi ne for implementing sequential circuits while the other two are not?
If it is instrumented with four active strain gages on awheatstone bridge, two axial and two transverse as shown, with S,i.e. strain gage factor of 2.1, initial resistance of strain gagesR = 350 Ω, and the power supply is 10V, what will be theoutp..
A certain iron core has an air gap with an effective area of 2 cm×3 cm and a length lg. The applied magne to motive force is 1000 A· turns, and the reluctance of the iron is negligible. Find the flux density and the energy stored in the air gap a..
Find the characteristics equation and the corresponding roots for the following ODEs and identify its case a) y" + 6Y' + 9y=0 b) 10y" + 18y' +5.6y=0 c) 10y" + 50y' + 65y =0 Slove the intial value problem a) problem 2a) with y(0)=2 and y'(0)=-5
Assume the equipment draws a current of 15A; compute the voltage on the chassis.
Design a synchronous counter with the following repeated sequence:2-4-6-1-3-5. Build the counter with T flip-flops and minimized gates. Assume the (active low)asynchronous clear is tied to a logic 1.
A certain oil filled 100 MVA three phase transformer is rated at 345 kV / 25 kV, 75 degree C temperature rise, FOA, 60 Hz, connected delta / grounded wye. The equivalent circuit of the transformer has leakage impedance of Z
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