Lab_5_Online

Questions: 1. Are the experimental and theoretical values of voltages and currents match? Indicate the percentage of differences. 2. Give possible reasons for any discrepancies

A PMMC type meter has a full scale deflection of 10 mA. The resistance of the coil is 30 ohm. Then (1) shunt value for an Ameter of 50 A range and (2) Find the value of series resistance required for the range up to 500 V.

High voltage engineering subject

What are the applications of clamper circuits? Enumerate 3. Provide references.

21. For direct current (dc), a capacitor acts like (a) a closed switch. (b) an open. (c) a short. (d) a small resistance.

Is Bridge Full Wave Rectifier only working with Transformers or can we use it with AC source as well? If you are agree with this then provide any advantage of this rectifier circuit without using the transformers OR if you are disagree then provide justification of your answer.

13. At what amperage differences will a GFCI trip? 14. What do DC and AC stand for? 15. True or False: An electron holds  a positive charge

what are charging and discharging time of this circuit.

a) Graphically show the differences between alternating current voltage (A.C) and direct current voltage (D.C). What are the advantages of A.C compared to D.C?

Part A- Why negative peaks are eliminated in Half Wave Rectification and how this can be achieved in Full Wave Rectification without eliminating these peaks? Part B- Is Bridge Full Wave Rectifier only working with Transformers or can we use it with AC source as well? If you are agree with this then provide any advantage of this rectifier circuit without using the transformers OR if you are disagree then provide justification of your answer.

A JFET is a driven device .... ... Select one: a. none of the above b. both current and voltage C. current d. voltage

1. Draw the voltage phasor diagram to explain the principle of :a) The dark lamp method.b) The bright lamp method.And hence deduce the maximum voltage across each pair of lamps.

Part B- Is Bridge Full Wave Rectifier only working with Transformers or can we use it with AC source as well? If you are agree with this then provide any advantage of this rectifier circuit without using the transformers OR if you are disagree then provide justification of your answer.

An AC ammeter is connected in series with the primary winding of T1. What is the expected current reading? An AC ammeter is connected in series with the secondary winding of T1. What is the expected current reading? An AC ammeter is connected in series with R1. What is the expected current reading? NOTE: Idc for HW rectifier = 0.318 * Ipeak = 0.45 * Irms Describe/Explain briefly the purpose/use of the array (series-parallel) connection of the rectifier diodes in the given circuit.

Q1. a) An SCR based AC power controller circuit is given in Figure 1. The circuit connects a 240V 50Hz AC source vi to a resistive load with resistance of 100. If the delay angle is a-15°, draw the waveforms of the load voltage Vo, and the voltage across SCR2. Calculate the power supplied to the load. + Vi Va + 2 SCR2 H₁₁ SCR₁ Figure 1 SCR based AC power control circuit Va + 2 io b) Figure 2 is a single phase 2-level voltage source converter (VSC) with a DC voltage Vd-200V. A PWM scheme, by comparing a reference value with a 10kHz triangle waveform, is used to control the switches S₁ and S2. The modulation index of the PWM is m=0.8. With the aid of graphs explain how pulse signals for the switches are generated, sketch the output voltage Vo, determine the duty cycle, and calculate the average output voltage. + Vo + Vo √ ₂ == Figure 2 A single phase VSC

Fill the blanks with suitable following terms (AND gate, Potential Transformers (PT), cathode ray oscilloscope CRO, electronic switch Current Transformers (CT), DC component, cathode ray tube (CRT), AC component, electron.gun. 1.The heart of a ............is the................. the electron beam is generated, accelerated, and deflected in accordance with the input signal. 2. Power measurements in high-voltage high current circuit can be effectively done by the use of...and.. ...in conjunction with conventional wattmeter. 3. The sig ...ose frequency is to be measured is converted into a train of pulses (Using Comparator for example), one pulse for each cycle of the signal and applied continuously to an...A 4. In Average Responding Voltmeter, the AC signal is first applied to the blocking capacitor used at the input to block any..................in the input voltage. 5. Dual Trace Oscilloscope This CRO has a single.....................whose electron beam is split into two by an…

1a) As depicted in the figure, input voltage is 120 Volts (RMS) and diode drops are 0.7 Volts. Design this circuit with given two outputs and calculate turns ratio of transformer. i) 10 V ii) 100 V

The type of output voltage from a Solar PV module is a. DC b. AC

B. Define ( resistance, reactance, impedance. rks rks

what is ripple ? how to minimize the rippl , draw the circuit and show ??

Discuss the importance of voltage stability in power systems and the methods to maintain voltage within acceptable limits.

(03) AC Diode circuits. (Course: Electronic Devices and Circuit Theory) -Redraw the circuit, Assume diodes are off and Redraw, Apply KVL. -You can add //comments for a better understanding. -Please answer without abbreviation. -Make it clean and clear typing/writing. Thank you.

Q5. For the following center tapped transformer, show the waveform across each half of the secondary winding and across Ri, when a 100 V peak sine wave is applied to the primarywinding. What is the PIV rating must the diode have? (Use constant voltage drop model for the Silicon diode) IN4001 Ry OV 10k) D IN4001

Two silicon diodes are connected in parallel and in series with resistor 0.33kohms and a battery of 10V. the voltage across the resistor 0.33k ohms is ___. The current flowing through resistor 0.33K ohms is approximately equal to___. The current of one diode is___.

A-How temperature affects the conductivity of conductive metals and how it affects semiconductors.semiconductors B-What is superconductivity, how does it relate to temperature? Some examples of superconductors.superconductors.

Figure 1 shows the circuit diagram for a simple d.c. power supply. a. Identify the type of rectifier circuit represented in figure 1 and explain the operation of the circuit with reference to the function of each component within the circuit. b. Sketch to scale the voltage across R as a function of time showing its relationship to the secondary voltage from the transformer.