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- C2 6. Figure shows a series resistance-capacitance bridge to R1 measure the capacitor, C3 and its leakage resistance of R3. The variable capacitor, C2 and resistor, R2 is adjusted alternately to null the bridge. The values of the resistors are RA given as R1 = 22 kN and R4 = 8 kN. The power supply frequency is 120 Hz. (i) Derive the equations for C3 and R3. (ii) Calculate the values of capacitor, C3 and resistor, R3 if the bridge is balanced when C2 = 4.7 µF and R2 = 150 2. [Module Test 2, March 2021] (ii) R3 = 54.55 , C3= 12.93 µF) R4 (Answer: (i) R3 = R2R4 C3 = R,C2 R1What will happen to the value of the impedance if the resistance will be increased or decreased? Explain...QUESTION 4 -) With the aid of suitable diagram, discuss and make comparison between an ideal AC and DC signals. For the circuit of Figure Q4a, illustrate the circuit in phasor domain equivalent circuit and hence find the input impedance, Zn 5cos2000t V 4/45° A m 10 mH ↑ Figure Q4a b) For the circuit of Figure Q4b, solve for the phasor current Is, and the real and reactive power supplied by the current source. ww k ww 50 50 2 50 μF Figure Q4b 2012 un 150 2 ww -1102 2502 150 Ω
- 1/ 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.A triac can pass a portion of …………… half-cycle through the load a. neither positive nor negative b. both positive and negative c. only negative d. only positive5) This MCQ QUESTION FROM BASIC POWER ELECTRICAL ENGINEERING course. just write for me the the correct answer.
- An AC circuit is shown in the diagram. The source of emf has a peak voltage of 9.00 V and a frequency of 60.0 Hz. Assume the wires contribute a negligible amount to the resistance and the AC source has negligible internal resistance. 524 2 493 2 1.56 k2 a) Find the equivalent resistance of the circuit. Redraw the circuit showing the equivalent resistor and use this simplified circuit for the rest of the problem. 315 2 Re = b) Find the rms current. 9.00 V, 60.0 Hz c) If the current is zero at time t= 0, find the first two times (after time t-0) that the current is equal to its rms value. and d) Find the average power dissipated by the circuit.a) An AC bridge circuit is constructed for measurement laboratory as shown in Figure Q3 (a). Its function is to measure the unknown value of capacitance during the null condition from the galvanometer. A R2 Detector Figure Q3(a) With reference to Figure Q3(a), answer the following questions: (i) Starting from equation (1), derive in detail the equations for resistance Rx and capacitance Cx, respectively as in equations (2) and (3). Z,Zx = Z,Z3 (1) Cx and Rx: R2C1 Rx C3 (2) R1 Сх (3) CS Scanned with CamScannefOSSecO A current Ip5A flows through long regular wire in emty space. an infinitely It square perimerer with a side length of 3 [cm] at A Second distance of d=4Ecm] from the eurrent On +he same plane with this current ldirection is giver in the figure J are awailable. Caleulate the enductance L42 as EuH].