Use Voltmeter, ammeter, wattmeter to determine active, reactive and apparent power consumed in given R-L series circuit, draw phasor diagram.
Last Answer : Practical Significance In the industry environment Electrical Engineering diploma graduate are expected to measure basic parameters like voltage, frequency, time period etc. for R-L series circuits. Therefore ... /varying L. 7. Draw the phasor diagram for each of reading for verification.
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511 views
1 answer
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Jan 1, 2021
by
anonymous
Write any two disadvantages of ammeter shunts.
Last Answer : Disadvantages of ammeter shunts: 1. Errors are caused because of change in temperature. 2. Most suitable for DC measurement. 3. Power loss takes place.
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167 views
1 answer
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Sep 6, 2018
by
anonymous
With neat diagram, explain the working of clip-on ammeter.
Last Answer : Working of Clip on Ammeter: Clip on ammeters are used to measure the high current flowing through bus bar, cable or fuse holders, which act as primary. It consists of split core current ... then clipped over the current carrying conductor. The dial will record the current directly.
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143 views
2 answers
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Sep 6, 2018
by
anonymous
Describe procedure for calibration of ammeter with diagram.
Last Answer : Procedure for Calibration of Ammeter: In this method, DC potentiometer is used for measurement of voltage across a standard low resistance. Connect the circuit as shown in the figure, ... S = resistance of potentiometer And the currents are compared for finding out error in ammeter.
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251 views
1 answer
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Sep 5, 2018
by
anonymous
How range of A.C. ammeter & A.C. voltmeter is extended? Draw suitable diagram.
Last Answer : Extension of A.C. Ammeter Range: The range of a.c. ammeter can be extended by using CT, the arrangement is shown in figure. The CT is current transformer having less number of primary turns carrying high ... high magnitude of source voltage. In this way range of a.c. voltmeter can be extended.
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455 views
1 answer
asked
Sep 5, 2018
by
anonymous
State the application of phase sequence indicator; clip on ammeter, frequency meter & P.F. meter.
Last Answer : Phase Sequence Indicator: 1. For finding correct phase sequence of supply 2. For obtaining exact instant of parallel operation of alternators. 3. For obtaining reversal of rotation ... 4. In electroplating industries 5. In various processes industries for measuring power factor
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146 views
1 answer
asked
Sep 5, 2018
by
anonymous
Draw a typical electric circuit including ammeter and voltmeter.
Last Answer : The figure shows typical electric circuit including ammeter and voltmeter. Ammeter is connected in series for measurement of current. Voltmeter is connected in parallel for measurement of voltage. Fuse is use ... are used. If the electric supply is DC the DC ammeter and DC voltmeter are used.
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325 views
1 answer
asked
Aug 8, 2018
by
anonymous
Last Answer : The function of shunt in an ammeter is to by pass the current.
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462 views
1 answer
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Mar 21, 2018
by
anonymous
Last Answer : An ammeter is a secondary instrument.
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82 views
1 answer
asked
Mar 21, 2018
by
anonymous
Last Answer : Ammeter is a current measuring device having low internal resistance so as to direct all the current flowing in the circuit through it. Hence Ammeter is always connected in series with the circuit. If ... If Ammeter is connected in parallel with the supply, then the supply will be a short circuit.
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131 views
1 answer
asked
Sep 10, 2017
by
anonymous
Last Answer : Yes it can...
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92 views
1 answer
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Sep 10, 2017
by
anonymous
what is ammeter ?
Last Answer : An instrument that is used to measure the amount of current flowing in a circuit.
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241 views
4 answers
asked
Aug 6, 2017
by
anonymous
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A network contains linear resistors and ideal voltage sources. If values of all the resistors are doubled then the voltage across each resistor will
Last Answer : A network contains linear resistors and ideal voltage sources. If values of all the resistors are doubled then the voltage across each resistor will not change
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312 views
1 answer
asked
Apr 29, 2018
by
anonymous
The internal resistances of an ideal current source, and an ideal voltage source are, respectively, (A) 0, ∞ (B) ∞, ∞ (C) ∞, 0 (D) 0,0
Last Answer : The internal resistances of an ideal current source, and an ideal voltage source are, respectively, ∞, 0
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179 views
1 answer
asked
Apr 28, 2018
by
anonymous
The gain of an ideal amplifier must be
Last Answer : The gain of an ideal amplifier must be infinity
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87 views
1 answer
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Apr 26, 2018
by
anonymous
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An ideal voltage source has?
Last Answer : An ideal voltage source has zero internal resistance.
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92 views
1 answer
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Mar 25, 2018
by
anonymous
An ideal voltage source should have?
Last Answer : An ideal voltage source should have zero source resistance.
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83 views
1 answer
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Mar 25, 2018
by
anonymous
Last Answer : An ideal traction system should have easy speed control, high starting tractive effort, equipment capable of with standing large temporary loads.
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90 views
1 answer
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Mar 22, 2018
by
anonymous
Last Answer : For any type of consumer the ideal tariff is three part tariff.
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127 views
1 answer
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Mar 20, 2018
by
anonymous
Last Answer : An ideal transformer is one which has no losses and magnetic leakage.
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222 views
1 answer
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Mar 19, 2018
by
anonymous
Last Answer : An ideal transformer will have maximum efficiency at a load such that copper loss equal to iron loss.
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204 views
1 answer
asked
Mar 19, 2018
by
anonymous
What are the desirable characteristics of ideal switch?
Last Answer : Desirable characteristics of the ideal switch: It is desirable to have power switches characteristics closer to ideal switch. The ideal switch should have the following characteristics. Zero resistance when ... . 100% efficiency. Able to control power flow with zero power dissipation.
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1.2k views
1 answer
asked
Feb 5, 2018
by
anonymous
what is ideal voltage source?
Last Answer : every voltage source have their own resistance that is called as internal resistance it is because of the resistance of electrodes and electrolytes in the battery interms of other supplyit have ... in universe it means ideal voltage source is this voltage source having internal resistance zero
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93 views
1 answer
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Aug 14, 2017
by
anonymous
Ratio of the rotor reactance X to the rotor resistance R for a two-phase servo motor (A) is equal to that of a normal induction motor (B) is less than that of a normal induction motor (C) ... than that of a normal induction motor (D) may be less or greater than that of a normal induction motor
Last Answer : C
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582 views
2 answers
asked
Apr 28, 2018
by
anonymous
Which diode exhibits negative resistance characteristic? (A) LED (B) Zener (C) Tunnel diode (D) PN diode
Last Answer : Which diode exhibits negative resistance characteristic? (A) LED (B) Zener (C) Tunnel diode (D) PN diode
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199 views
1 answer
asked
Apr 28, 2018
by
anonymous
What affect does the thickness of a wire have on its resistance?
Last Answer : Ans: The resistance of a wire decreases as its thickness increases.
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5 views
1 answer
Which of these has the lowest resistance?
Last Answer : b) Copper has the lowest resistance.
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7 views
1 answer
Name two materials that have a different electric resistance.
Last Answer : Ans: a) copper, nichrome
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5 views
1 answer
State the procedure for testing of earth pit resistance with necessary diagrams.
Last Answer : Following procedure (Method) for testing of earth pit resistance with necessary diagrams. 1) Earth Tester : i) Three point method ii) Four point method 2) By Potential drop method 3 ... of that earthing pit. In this test the accuracy is less but electrical rods are not required.
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252 views
1 answer
asked
May 7, 2020
by
anonymous
State the impact of inductance and resistance on transmission line performance
Last Answer : Impact of inductance on transmission line: 1) It causes IXL drop in transmission line which affects regulation. 2) It is the only parameter which decides power transmission capacity of line i. ... is very small, it causes losses, temperature rise& poor voltage regulation so it cannot be neglected
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188 views
1 answer
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May 6, 2020
by
anonymous
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What do you mean by exciting resistance and exciting reactance?
Last Answer : At no-load, a transformer behaves as a highly inductive load connected to the system which contains some resistance and inductance in parallel. The resistance is called exciting resistance R0 = V1/I w and reactance is called exciting reactance, X0 = V1/I mag
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183 views
2 answers
asked
Apr 28, 2020
by
anonymous
Write measures to be taken to maintain the insulation resistance of electrical machines to healthy levels.
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69 views
0 answers
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Apr 16, 2020
by
anonymous
Resistance
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%; }
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95 views
1 answer
asked
Mar 19, 2020
by
anonymous
what is equivalent resistance when four 4 Ohm resistors are connected in i) series ii) parallel
Last Answer : equivalent resistance
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370 views
2 answers
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Jan 24, 2020
by
anonymous
role of the series resistance connected in PMMC movement.
Last Answer : A PMMC Instrument can be used as voltmeter by just connecting a series resistance with the moving coil. This series resistance is called Voltmeter Multiplier. This combination of moving coil and ... current whose voltage is to be measured. Ideally the resistance of voltmeter should be infinite
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161 views
1 answer
asked
Sep 4, 2019
by
anonymous
Define resistance with its unit.
Last Answer : Resistance is a measure of the degree to which a substance impedes the flow of electric current induced by a voltage. Or Resistance is the opposition to current flow in an electrical circuit. Unit is ohm.(Ω)
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70 views
1 answer
asked
Aug 19, 2019
by
anonymous
List two advantages of platinum resistance thermometer.
Last Answer : 1. The platinum resistance thermometer is stable 2. It is resistant to corrosion 3. It is resistant to oxidation
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60 views
1 answer
asked
Jul 27, 2019
by
anonymous
What is the mathematical relationship between resistance and conductance?
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96 views
0 answers
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Jun 29, 2019
by
anonymous
How does the resistance of a conductor compare to that of an insulator?
Last Answer : The resistance of a conductor can be significantly lower than the resistance of an insulator, depending on each material's atomic properties.
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2.7k views
1 answer
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Jun 29, 2019
by
anonymous
Resistance formula
Last Answer : The formula for resistance is, Where, R = resistance in Ohms ρ = resistivity in ohm - metre l = length A = cross sectional area
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2 answers
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Jun 11, 2019
by
anonymous
Parallel Reactance and Resistance Example 1
Last Answer : Parallel Reactance and Resistance Example 1
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2 answers
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May 30, 2019
by
anonymous
AC Circuits with Resistance but No Reactance
Last Answer : AC Circuits with Resistance but No Reactance AC Circuits with Resistance but No Reactance Series resistances let two resistances R 1 and R 2 are connected in series as shows in figure and there ... voltage. Voltage V A is common to both the branch hence voltage V A is common reference.
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101 views
1 answer
asked
May 26, 2019
by
anonymous
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Problems on resistance and resistivity
Last Answer : Problem on resistance and resistivity 1 : https://youtu.be/OqavD7OlZUs Problem on resistance and resistivity 2 : https://youtu.be/0eo8VO8cpwk Problem on resistance and resistivity 3 : https:// ... https://youtu.be/3neLRCTz0RQ Problem on resistance and resistivity 13 : https://youtu.be/vBCkvPOiztY
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105 views
1 answer
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May 21, 2019
by
anonymous
Problem on temperature coefficient of resistance 3
Last Answer : Problem on temperature coefficient of resistance 3
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1 answer
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May 20, 2019
by
anonymous
Problem on temperature coefficient of resistance 2
Last Answer : Problem on temperature coefficient of resistance 2
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1 answer
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May 20, 2019
by
anonymous
Problem on temperature coefficient of resistance 1
Last Answer : Problem on temperature coefficient of resistance 1
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1 answer
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May 19, 2019
by
anonymous
Problem on resistance and resistivity 13
Last Answer : Problem on resistance and resistivity 13
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1 answer
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May 19, 2019
by
anonymous
Problem on resistance and resistivity 12
Last Answer : Problem on resistance and resistivity 12
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1 answer
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May 19, 2019
by
anonymous
Problem on resistance and resistivity 11
Last Answer : Problem on resistance and resistivity 11
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59 views
1 answer
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May 19, 2019
by
anonymous
Problem on resistance and resistivity 10
Last Answer : Problem on resistance and resistivity 10
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65 views
1 answer
asked
May 19, 2019
by
anonymous
