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

2b- Please solve this question in detail. Many Thanks   Note: It is preferable by keyboard typing.

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.

please write introduction about AC Circuits and Parallel Circuits

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

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

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

what are charging and discharging time of this circuit.

How open circuit test can be performed? Which type of losses can be found using this test? Subject Electrical machine

Answer question clearly and fully. Make sure I can properly read out the steps. Include any and all equations used during the solving process.

Please answer all subparts for like either dislike is ready.. Please all subparts in short..

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.

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

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.

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

The purpose of the current limiting resistor in a Zener diode circuit is to _________. a. Maintain a constant current through the load resistor b. Maintain a constant voltage across the Zener diode c. Maintain a constant current through the Zener diode d. Drop the additional voltage from the power supply in order to maintain a constant voltage across the Zener diode Please answer it clearly.

...fast and very fast..in 4 minute..

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

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

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

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.

1. Explain with a neat block diagram the measurement of temperature using Thermistor (measuring system). 2. With neat diagram explain the construction and working principle of RTD.