# 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 revolving disc

4.  all of these

4

square of the flux of the permanent magnet

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

4

none of these

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

450

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%

4

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 meters having a large current rating for which loads may not be available

4

to test meters 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 a constant torque irrespective of load

2.  lag circuits

3.  drilling holes in the disc

4.  none of these

4

shading bands which are actuated by to provide a 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

4

Explanation :
No Explanation available for this question

# Creeping in a single phase induction type energy meter may be due to

1.   overcompensation for friction

2.  over voltage

3.  vibrations

4.  all of these

4

all of these

Explanation :
No Explanation available for this question

# Light load adjustments for induction type energy meters are usually done at

1.  10% of full load current

2.  5% of full load current.

3.  50% of full load current

4.  1% of full load current.

4

Explanation :
No Explanation available for this question

# The controlling torque I single phase power factor meters is provided by

1.  spring control

2.  gravity control

3.  stiffness of suspension

4.  none of these

4