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Previous years GATE problems based on Two Wattmeter Method (Part 4)
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In this lesson I've discussed previous years GATE problems based on Two Wattmeter Method.

Pawan Chandani is teaching live on Unacademy Plus

Pawan Chandani
Faculty of GATE/ESE (Electrical Engineering) , Also a YouTuber and teaches Electrical Eng. subjects on YouTube | Jony Ive Award Winner

U
Unacademy user
sorry sir the query is in lesson 5
sir ques 17 ka answer galat h aapka -800 watt answer aaega iska
sir your videos are fentastic ,but we need english
Sir,at 3:00 , you have said that Vry is line voltage and line voltage leads the phase voltage by 30; shouldn't the statement be that phase voltage leads the line voltage by 30??...also Sir this condition of 30 degree phase between phase and line voltage is valid for a y connected load but how do we from the question that it's a star connected load??
RA
What will be the effect if we connect potential coil and current coil in series between B and Y in delta connection.
sir please upload reamining lectures.
Pawan Chandani
a year ago
measurements part 5 will be uploaded tomorrow....
Mir Shakeel
a year ago
thanku very much sir.
Mir Shakeel
a year ago
sir waiting.
Mir Shakeel
a year ago
sir reply
Pawan Chandani
a year ago
it has been uploaded
Mir Shakeel
a year ago
thanku sir
  1. Previous Year GATE problems based on Two Wattmeter Method By- Pawan Chandani


  2. Q 16. A single-phase is connected between R and Y terminals of a 415V, symmetrical, 3- phase, 4-wire system with phase sequence RYB. A wattmeter is connected in the system as shown in figure. The power factor of the load is 0.8 lagging. The wattmeter will read 0 o/


  3. Q 16. A single-phase load is connected between R and Y terminals of a 415V, symmetrical, 3-phase, 4-wire system with phase sequence RYB. A wattmeter is connected in the system as shown in figure. The power factor of the load is 0.8 lagging . The wattmeter will read o/ Ry 8N 0.8 Pa R N BN Ph , 30 L-6.86 100 100 L 36.86.


  4. W UPnx x cos (120'-(-6.86")) /00 . 5Cos (126.86) 0 x COS 597 W


  5. Q 17. The figure shows a three phase delta connected load supplied from a 400V, 50Hz, 30 balanced source. The pressure coil and current coil of a wattmeter are connected to the load as shown. With the coil polarities suitably selected to ensure a positive deflection The wattmeter reading will be 3- suppl C. C . . 50 Hz


  6. Q 17. The figure shows a three phase delta connected load supplied from a 400V, 50Hz, 30 balanced source. The pressure coil and current coil of a wattmeter are connected to the load as shown. With the coil polarities suitably selected to ensure a positive deflection. The wattmeter reading will be BR Suppl . . VL-120 ooV 50H2 = 8R YB V, L 120 400 20 -2I2o 100


  7. W yooxy cos (60'-120 )


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