# When measuring power with an electrodynamometer wattmeter in a circuit having a low power factor

1.  The current coil should be connected on the load side

2.  The current coil should be connected on the supply side

3.  The pressure coil should be connected on the load side

4.  A compensated wattmeter with pressure coil connected on the load side should be used

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A compensated wattmeter with pressure coil connected on the load side should be used

Explanation :
No Explanation available for this question

# The power in a 3-phase circuit is measured with the help of 2 wattmeter is positive and that of the others is negative. The magnitude of readings is different. It can be concluded that the power factor of the circuit is

1.  Unity

2.       zero (lagging)

3.    0.5 (lagging)

4.      less than 0.5 (lagging)

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less than 0.5 (lagging)

Explanation :
No Explanation available for this question

# The breaking torque provided by a permanent magnet in a single phase energy meter is proportional to the

1.  Square of the flux of the permanent magnet

2.  Speed of the meter

3.  Distance of the permanent magnet from the center of the providing disc

4.  All of these

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All of these

Explanation :
No Explanation available for this question

# In the single phase induction meter, in order to obtain true value of energy, the shunt magnet flux should lag behind the applied voltage by

1.  900

2.      00

3.      450

4.    none of these

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900

Explanation :
No Explanation available for this question

# In an induction type of meter, maximum torque is produced when the phase angle, between the two fluxes is

1.  00

2.     450

3.       600

4.  900

4

900

Explanation :
No Explanation available for this question

# In a single phase induction type energy, the lag adjustment is done

1.  To make the current coil flux to lag 900 behind the applied voltage

2.  To make the pressure coil flux to lag 900 behind the applied voltage

3.  To bring the pressure coil flux in phase with the applied voltage

4.  None of these

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To make the pressure coil flux to lag 900 behind the applied voltage

Explanation :
No Explanation available for this question

# In a circuit of a single phase induction energy meter, the pressure coil lags the voltage 880 the errors while measuring power in two circuits having power factors of unity and 0.5 lagging are respectively are

1.  -0.061%, +6.1%

2.  +0.061%, -6.1%

3.  -0.061%,-6.1%

4.  -6.1%,-6.1%

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-0.061\%,-6.1\%

Explanation :
No Explanation available for this question

1.  To isolate the current and potential circuits

2.  To reduce power loss during testing

3.  For meters having low current ratings

4.  To test members having a large current rating for which loads may not be available

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To test members having a large current rating for which loads may not be available

Explanation :
No Explanation available for this question

# In an induction type energy meter, compensation for static fraction is provided by

1.  Shading bands which are actuated by to provide constant torque irrespective of  load

2.  Lag circuits

3.  Drilling holes in the disc

4.  None of these

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Shading bands which are actuated by to provide constant torque irrespective of  load

Explanation :
No Explanation available for this question

# If an induction type energy meter runs fast it can be slowed down by

3.  Adjusting the position of braking magnet and making it come closer to the center of the disc

4.  Adjusting the position of braking magnet and making it move away for the center of the disc

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