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Anderson’s bridge is a modification of: Maxwell’s wien bridge.

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The bridge most suited for measurement of a four-terminal resistance in the range of 0.001 Ohm to 0.1 Ohm (A) Wien’s bridge (B) Kelvin double bridge (C) Maxwell’s bridge (D) Shering Bridge

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asked Jun 4, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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Hay bridge is suitable for measuring following type of inductance (a) having Q greater than 10. (b) having Q less than 10. (c) having any value of Q. (d) having phase angle of reactance very large. 

asked May 26, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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asked May 26, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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asked May 13, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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A solar cell of 350 V is feeding power to an ac supply of 440 V, 50 Hz through a 3-phase fully controlled bridge converter. A large inductance is connected in the dc circuit to maintain the dc current at 20 A. If the solar cell resistance is 0.5 Ohm ,then each thyristor will be reverse biased for a period of  (A) 125o (B) 120o (C) 60o (D) 55o

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A single-phase fully controlled thyristor bridge ac-dc converter is operating at a firing angle of 25o and an overlap angle of 10o with constant dc output current of 20 A. The fundamental power factor (displacement factor) at input ac mains is  (A) 0.78 (B) 0.827 (C) 0.866 (D) 0.9

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The ripple factor of a bridge rectifier is  1.0.48 2.0.812 3. 1.11 4. 1.21 

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A single phase fully controlled thyristor bridge ac -dc converter is operating at a firing angle of 25 degree and an overlap angle 10 degree with constant dc output current of 20A. The fundamental power factor (displacement factor) at input ac mains is : (A) 0.78 (B) 0.827 (C) 0.866 (0) 0.9

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The no-load speed of a single-phase SCR bridge converter fed separately excited dc motor operating at a firing delay angle, α and flux, Φ (A) directly proportional to α and Φ (B) inversely proportional to α and Φ (C) directly proportional to α and inversely proportional to Φ (D) directly proportional to Φ and inversely proportional to α

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With the help of which bridge are the capacitance and dielectric loss of a capacitor generally measured ?

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A three-phase, fully controlled thyristor bridge converter is used as line commutated inverter to feed 50 kW power 420 V dc to a three-phase, 415 V(line), 50 Hz ac mains. Consider dc link current to be constant. The rms current of the thyristor is  (A) 119.05 A (B) 79.37 A (C) 68.73 A (D) 39.68 A

asked May 18, 2018 in Power electronics converters by Shimroz123
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A Wien Bridge Oscillator is suitable for  1. Audio frequency applications 2. Radio frequency applications 3. Very low frequency applications Which of the above frequency applications is/are correct ?

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 Maxwell's inductance - capacitance bridge is used for measurement of Inductance of: -  a) Low Q coils b) Medium Q coils c) High Q coils d) Low and medium Q coils

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1 answer 23 views

A 10A DC Ammeter has a resistance of 0.1 Ω is to be extended to 50 A, the required shunt wire is A) Manganin wire of 20 m Ω B) Constantan wire of 20 m Ω C) Manganin wire of 25 m Ω D) Constantan wire of 25 m Ω

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In a standard multimeter for measuring AC voltage, parameter of _____ voltage is measured

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The constant of a given energy meter is 500 revolution/kWh. At the test 4.4 kW full load, meter completes 50 revolutions in 86 seconds. The percentage error of the meter is (a) –4.86% (b) 4.86% (c) 2.0% (d) 3.0%

asked May 26, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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What will happen if a voltmeter is connected like an ammeter in series of the load ? (a) The meter will burn out. (b) The measurement will be too high. (c) The same current will flow as would have been with ammeter in circuit. (d) There will be almost no current in the circuit. 

asked May 26, 2018 in Electrical Measurements and Instrumentation by Shimroz123

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