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Which of the following is present inside the fluorescent tube

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The current coil of a wattmeter is connected to the C.T. of R phase. Its potential coil is connected across Y & B phases. The wattmeter measures (a) active power in R phase (b) active power of Y-phase (c) reactive power in R-phase (d) power proportional to 3-phase power if the load is balanced 

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asked Mar 24, 2018 in Electrical Engineering by Shimroz123
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asked Aug 12, 2018 in Basic electrical and electronics engineering by Quiz
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asked May 20, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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asked May 17, 2018 in Power electronics converters by Shimroz123
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asked May 29, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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asked May 25, 2018 in Electrical Engineering by Shimroz123
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A resistor connected across the gate and cathode of an SCR in a circuit increases its (A) dv/dt rating (B) Holding current (C) Noise Immunity (D) Turn-off time

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
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asked May 24, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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The sequence components of current of a single-phase load connected to a 3-phase system are (A) equal positive and negative sequence components (B) equal positive, negative and zero sequence components (C) vector sum of sequence currents is zero (D) algebraic sum of sequence currents is zero

asked Apr 28, 2018 in Power system by Shimroz123
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A parallel combination of capacitance C and resistance R is connected in series with inductance L and small resistance r. Under what condition will the circuit be non-reactive?  (A) C=LR (B) C=LR2 (C) C=L/R2 (D) C=L/R

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
1 answer 18 views

 In the measurement of power of balanced load by two wattmeter method in a 3-phase circuit, The readings of the wattmeters are 4 kW and 2 kW respectively, the later is being taken after reversing the connections of current coil. the power factor and reactive power of the load is A) 0.2 & 6 kVAR B) 0.2 & 6 √3 kVAR C) 0.32 & 2 kVAR D) 0.32 & 2 √3 kVAR

asked Jun 17, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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While measuring power in a three phase load by two wattmeter method, the reading of two wattmeter are equal and opposite, when (a) load is balanced (b) power factor is unity (c) phase angle is between 60° to 90° (d) the load is purely inductive 

asked May 26, 2018 in Electrical Measurements and Instrumentation by Shimroz123
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In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be?

asked Mar 21, 2018 in Electrical Measurements and Instrumentation by Shimroz123

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