Proof the expression for string efficiency.
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- Subject: Electrical Apparatus and Devices The percentage resistance and reactance of a transformer are 2%and4% respectively.(a) find the approximate percentage voltage on full load at 0.85 of lagging (b) find the approximate percentage voltage regulation on full load at 0.85pf leading4- Can value of the string efficiency being equal to 100%. Explain your answer.5- Outline methods used to equalize the potential across the units.6- Why an insulator is represented as a capacitor C? What are the assumptionmodes?continuity Choose... test Done Choose... maximize the loading effect minimize the loading effect multimeter voltmeter
- A full ware rectifier has load resistance of SODR ind the used diode has interna) Jesistance of Son If the tun 70 half of selondary of truns former is ratio foom primary 240 V rMs 1s 5:2 and primary winding veltage ヘo Hz the a Caleulate: outjut current. and ac リフCalculations of heat loss, HL, and heat gain, HG, must be compliant according to ASHARE HX212. True False1/ Suppose that there are two types of H.V.T.Ls operating at the same voltage and carrying the same current, but one of them with smooth shapewhile the other with standard shape. Which of them, you will choose? a. choosing the smooth one. b. choosing the standard one. c. choosing the one with hollow construction shape. d. all these answers are wrong. 2/ As the ambient temperature in crease the disruptive critical voltage of coron a is: a. Decreased b. Increased c. No effect d. All these answers are wrong. 3/ Using HV underground cable improvevoltageprofile and power factor in any loaded inductive electrical grid because. a. Due to its inductive power effect. b. Due to resistive Effect. c. Due to its capacitive power effect. d. All of the above answers are wrong.
- Ge 10:1 m Thanks Any help will be appreciated. S BL • I am doing a AC DC 12 W Regulated power supply with 110 vrms and 60HZ as an input, and I need an output of 6v and 9 V. I have the designed already: the step-down transformer, Resistor as a current limiter to protect the Zener diode, a capacitor for the ripple voltage, and a 2 state switch ( when the switch is closed to the RL will give 9 V and when is closed to the S will give 6V as an output). • I need some support with some calculations to find PIV for each diode // Average Power// some calculations in how to find the values for the resistors and capacitors to accomplish the desire output // and some calculations for the ripple voltage. Note: the Zener is regulated to 9v. I know the RL>R to get the desire output.1. A Type K Thermocouple has the hot junction connected to the exhaust gas duct of a steam turbine. The cold junction is at a temperature of 25 °C. If the potential difference between the hot and the cold junctions is measured to be 6.3 mV, what is the temperature of the duct?What unit do we use to report coupling constants (aka J-values)? a) MHz b) Hz c) ppm d) %