A uniform illumination of 150 lux is to be obtained on the floor of a room measuring 15m x 15m by arranging electric lights suitably. Calculate the number of lamps and wattage of each ... lamp efficiency is 20 lumens/watt. Assume and write suitable values of constants required for this calculation.
A three-phase transformer having a line voltage ratio of 0.4 kV/11kV is connected Star/Delta and protective transformers on the 0.4 kV side have a current ratio of 500/5. Calculate the ratio of ... on the 11 kV side. Draw a neat circuit diagram and indicate the given values at appropriate places.
What is the difference between D value and Z-value?
How to calculate z parameter?
How do you calculate Z impedance?
What is the relation between line and phase values in a star and delta connected system?
State significance of earthing. Draw and explain pipe earthing. State the values of earth resistances for: (i) Substation (ii) Residential wiring (iii) H.T. Line (iv) L.T. Line.
Convert the following Boolean equation to standard SOP form and implement using NAND-NAND logic: (i) y = A'B'C' + ABC'D' + A'C'D' (ii) y = PQ + P'QR + PQR.
How do you determine the component values in an SMPS?
What is the Brewster angle values?
Write the expression for the instantaneous values of EMFs in a 3-phase circuit. Answer : In a 3-phase circuit, the instantaneous values of the Electromotive Forces (EMFs) in the three phases can be expressed as sinusoidal functions, assuming a balanced system where the phases are 120° ... , these expressions show how the voltages in each phase are related in both magnitude and phase....
Determine the power factor of an RLC series circuit with given values.
What is a to D conversion?
what happen if we give 220 volts dc supply to d bulb r tube light?
Is the superposition theorem applicable only to networks that are a linear b nonlinear c time invariant d passive?
How to Calculate the charging Time and Charging current for battery Charging? Answer : To calculate the charging time and charging current for a battery, we need to know a few basic parameters. Here's how to calculate each: ### 1. **Charging Current Calculation:** The charging ... of batteries have different safe charging currents. Let me know if you need more details on this!...
How to calculate primary and secondary voltage?
How to calculate ammeter and voltmeter?
How to convert Z parameters to y parameters?
How to find z parameter in two-port network?
How can you relate the z parameter to the y parameter?
How to convert z parameters to Y parameters?
How to solve z parameter?
How do you convert ABCD parameters to Z-parameters?
How to convert Z-parameters to y parameters?
How to find z parameter from y parameter?
How to convert ABCD parameters to Z-parameters?
How to determine z parameter?
What is E type and D type MOSFET?
What is the difference between a Class D and Class E amplifier?
What is the difference between a JK flip-flop and a D flip-flop?
What is the relationship between D and E and P?
What is the relation between electric displacement d electric field e and electric polarization p in electrostatic units?
What is the equation for the relation between electric displacement vector D and polarization P?
What is the relationship between the displacement vector D and electric field strength E?
What is the relationship between PE and D?
What is the relationship between E and D?
What is the working principle of a D and D A converter?
State the meaning of FACTS and explain in brief d-types facts controller.
What is T and D in electrical?
A wedge-shaped thin glass plate of refractive index 1.52 is used to observe fringes of equal thickness. The fringe spacing is 1 mm and the wavelength of light used is 5893 Å. Calculate the angle of the wedge.
A 3 phase line of 4 km length delivers 4000 kW at a p.f of 0.8 lagging to a load the resistance and reactance per km of each conductor are 0.2 Ω and 0.5 Ω respectively if the voltage at the supply end is maintained at 11 kV. Calculate the received end voltage and efficiency of line.
The power input to a 500V 50Hz 6Pole 3 phase induction motor running at 975 rpm is 40 kW. The stator losses are 1kW and friction and windage losses are 2kW. Calculate: (i) Slip (ii) Rotor copper loss (iii) Shaft power (iv) Efficiency
State Thevenin’s theorem and give a proof. Apply this theorem to calculate the current through a resistor.
A 3 φ I.M. has synchronous speed of 250rpm and 4% slip at full load. The rotor has a resistance of 0.02Ω/ph and stand still reactance of 0.15Ω/ph. Calculate i) The speed at which max torque is developed. ii) The ratio of maximum to F. L. torque. iii) The ratio of maximum to starting torque.
How does a class D amplifier achieve high efficiency?
How does a class D amplifier work?
What are the 20 computer terms a to z?
What is the formula to solve for z-score?
How to calculate the Hall voltage?
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