Which of the following waveforms has the lowest form factor?
A) Sine wave B) Square wave
C) Sawtooth wave D) Triangle wave
Description : Define form factor and peak factor.
Last Answer : Form factor is equal to rms value divided by average value ... Peak factor is equal to Max value divided by rms value.
Description : Form factor for a sine wave is?
Last Answer : 1.11
Last Answer : The form factor is the ratio of r.m.s. value to average value.
Description : What is Phase sequence? Draw waveforms of 3 phase emf.
Last Answer : Phase sequence: It is the order in which the three phases reach their peak or maximum values. It is shown in below fig. the phase sequence is A-B-C (or R-Y-B). In the following waveforms, it is ... 120º, B- phase voltage attains its positive maximum value. So the phase sequence is R-Y-B.
Description : In which of the following waveforms is RMS voltage equal to the average voltage? A) Triangle wave B) Square wave C) Sine wave D) None of these
Last Answer : In which of the following waveforms is RMS voltage equal to the average voltage? A) Triangle wave B) Square wave C) Sine wave D) None of these
Description : Draw the block diagram of regulated power supply, explain function of each block and draw waveforms of each stage.
Last Answer : 1. A step down transformer 2. A rectifier 3. A filter 4. A regulator Operation of Regulated Power Supply:- Step Down Transformer:- A step down transformer will ... regulator. A regulator will maintain the output constant even when changes at the input or any other changes occur.
Description : State different types of electrical signal and draw all types of waveforms.
Last Answer : Types of electrical signals 1) Sine wave 2) Triangular wave 3) Square wave Waveforms
Description : Which of the following has the lowest electrical conductivity? A) Mercury B) Silver C) Copper D) Gold
Last Answer : Which of the following has the lowest electrical conductivity? A) Mercury B) Silver C) Copper D) Gold
Description : The lowest eigenvalue of the 2x2 matrix
Last Answer : Linear Algebra Problem The lowest eigenvalue of the 2x2 matrix https://youtu.be/QatcRTzF7EA
Description : Which configuration has the lowest current gain ?
Last Answer : Common base configuration has the lowest current gain.
Description : Express the following functions in cosine form
Last Answer : Express the following functions in cosine form
Last Answer : IEC stands for International Electrotechnical Commission.
Description : what is the full form of ISO ?
Last Answer : ISO stands for International Orgazisation for Standardization.
Description : Give the full form of LASER.
Last Answer : Full form : Light Amplification by Stimulated Emission of Radiation.
Description : Give the full form of SCADA & HMI.
Last Answer : Full Form of SCADA and HMI: SCADA:-Supervisory Control and Data Acquisition HMI :- Human Machine Interface
Description : Evaluate the following quantities and express your results in polar form
Last Answer : Evaluate the following quantities and express your results in polar form
Description : Evaluate the following complex numbers and leave your results in polar form
Last Answer : Evaluate the following complex numbers and leave your results in polar form
Description : Calculate these complex numbers and express your results in rectangular form
Last Answer : Calculate these complex numbers and express your results in rectangular form
Description : What is the full form of ACSR?
Last Answer : Aluminum conductor steel rainforce
Description : What is the full form of IC?
Last Answer : Instrument circuit
Description : Briefly explain how the power factor of an inductive circuit can be improved.
Last Answer : As we know that power factor should be corrected to ensure that the current supplied is cost friendly. Meaning the power factor should be around one but not greater than one(0.8-0.9) in a ... an inductive circuit due to the inductive reactance which oppose the change of current in the ac circuit.
Description : working of distortion factor meter with block diagram
Last Answer : Working : Initially the switch S is kept at position 1.The attenuator gets excluded and the bridge T network is adjusted for full suppression of fundamental frequency and hence we get ... is obtained on the meter.Thus the total rms distortion is indicated by the reading of attenuator.
Description : Why capacitors are used to improve power factor?
Last Answer : Capacitors generate reactive power instead of that drawn from source which is required by inductive loads.so it reduce the reactive current which is drawn from source to be drawn from capacitor.This control in Electric bills cost.
Description : With a neat sketch explain working of 1 phase dynamometer type power factor meter.
Last Answer : Working of 1 phase dynamometer type power factor meter : The current coil is connected in series with load. Two pressure coils marked as A and B are connected across the supply terminals ... becomes stationary and the pointer shows steady deflection corresponding to the power factor of the load.
Description : State the significance of power factor.
Last Answer : Significance of power factor:- 1. Cosine of angle between voltage & current in a circuit is called power factor. 2. It is a measure of the real power in a circuit. 3. Inductive & ... KVA rating equipment 5. Greater conductor size 6. CosØ = R/Z CosØ= Active Power/ Apparent Power
Description : Define ripple factor and PIV of diode.
Last Answer : 1. Ripple factor: It is define as ratio of R.M.S. value of AC component to the DC component in the output. 2. PIV : It is maximum reverse voltage that diode can withstand without destroying junction.
Description : The following formula is correct: (A) Diversity factor =1 / Coincidence Factor (B) Diversity factor =1 x Coincidence Factor (C) Diversity factor =1 - Coincidence Factor (D) All of the above
Last Answer : The following formula is correct: (A) Diversity factor =1 / Coincidence Factor (B) Diversity factor =1 x Coincidence Factor (C) Diversity factor =1 - Coincidence Factor (D) All of the above
Description : The power factor of dielectric : (A) is a function of temperature of the dielectric only (B) depends only on voltage stress to which the dielectric is stressed (C) always constant (D) both (A) and (B)
Last Answer : The power factor of dielectric : (A) is a function of temperature of the dielectric only (B) depends only on voltage stress to which the dielectric is stressed (C) always constant (D) both (A) and (B)
Description : What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these
Last Answer : What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these
Description : What is crest factor (peak factor)? A) It is the ratio of the maximum amplitude to average value B) It is the ratio of the average amplitude and RMS value C) It is the ratio of the maximum amplitude to RMS value D) None of these
Last Answer : What is crest factor (peak factor)? A) It is the ratio of the maximum amplitude to average value B) It is the ratio of the average amplitude and RMS value C) It is the ratio of the maximum amplitude to RMS value D) None of these
Description : The power factor of a D.C. circuit is always?
Last Answer : The power factor of a D.C. circuit is always unity.
Description : The ratio of active power to apparent power is known as____ factor.
Last Answer : The ratio of active power to apparent power is known as power factor.
Description : The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is?
Last Answer : The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is 32 kW.
Description : Power factor of electric bulb is?
Last Answer : Power factor of electric bulb is unity.
Description : The power factor at resonance in R-L- C parallel circuit is?
Last Answer : since a rlc circuit at resonance behaves like a pure resistive circuit, i.e there is no phase difference between current and voltage, hence the power factor is unity.
Description : Power factor of the system is kept high?
Last Answer : Power factor of the system is kept high to reduce line losses, to maximise the utilization of the capacities of generators, lines and transformers, to reduce voltage regulation of the line.
Description : Power factor of an inductive circuit is usually improved by connecting capacitor to it in?
Last Answer : Power factor of an inductive circuit is usually improved by connecting capacitor to it in parallel.
Description : Capacitors for power factor correction are rated in?
Last Answer : Capacitors for power factor correction are rated in kVAR.
Description : Poor power factor?
Last Answer : Poor power factor reduces load handling capability of electrical system, results in more power losses in the electrical system, overloads alternators, transformers and distribution lines, results in more voltage drop in the line.
Description : Power factor of an electrical circuit is equal to?
Last Answer : Power factor of an electrical circuit is equal to R/Z, cosine of phase angle difference between current and voltage, kW/kVA.
Description : What is the power factor of purely resistive circuit.
Last Answer : Unity that is 1
Description : What Does Quality Factor Mean?
Last Answer : Answer :The Quality factor is also defined, as Q. So it is a number, which reflects the lossness of a circuit. Higher the Q, the lower are the losses.
Description : What is meant by Power factor?
Last Answer : Ans. Power factor means ratio of true power to apparent power. It is cosine of phase angle between voltage and current. Its value is 1 for Unity P.F. Loads, 0 to 1 lagging for inductive loads and o to 1 leading for capacitive loads.
Description : State the effects of low power factor on efficiency and voltage regulation of short transmission lines.
Last Answer : i) Effect of Low power factor on efficiency:- When power factor of load reduces current drawn by transmission line increases so copper losses in transmission line increases, hence transmission ... increases, so voltage drop in transmission line increases so regulation increases. (Become Poor)
Description : Define leakage factor.
Last Answer : It is the ratio of total flux to leakage flux.
Description : Define PIV, TUF, ripple factor, efficiency of rectifier.
Last Answer : PIV: Peak Inverse Voltage (PIV) is defined as the maximum negative voltage which appears across non-conducting reverse biased diode. TUF : Transformer Utilization Factor (TUF) is defined as the ratio of DC output ... Efficiency of rectifier: η = DC output power/ AC input power = PLdc / Pac
Description : Define : i) Strain gauge ii) Gauge factor
Last Answer : i) Strain gauge is a resistance transducer whose resistance varies with applied force; It converts force, pressure, tension, weight, etc., into a change in electrical resistance which can then be measured ... is defined as the ratio of per unit change in resistance to per unit change in length
Description : Define ripple factor and PIV of HWR
Last Answer : Peak Inverse Voltage (PIV) or Peak Reverse Voltage (PRV) refer to the maximum voltage a diode can withstand in the reverse-biased direction before breakdown. Also may be called Reverse Breakdown Voltage.
Description : Availability factor
Last Answer : .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
Description : Discuss how power factor tariff results into energy conservation.
Last Answer : Power factor tariff results into energy conservation: i) Applying incentives and penalties according to power factor is an effective way, which enables consumer to improve power factor so that he can ... finally leads to reduction in the current drawn by the load and helps for energy conservation.