Q. In Weston synchronoscope the fixed coils are connected across

View solution

Q. Which of the following is not a transducer in true sense?

View solution

Q. In low power factor wattmeter, the pressure coil is connected

View solution

Q. The signal to noise ratio in telemetry should be better than

View solution

Q. Assertion (A): Electrodynamic instrument is not used as ammeter or voltmeter.

Reason (R): Electrodynamic instrument is more costly than PMMC and moving iron instrument.

View solution

Q. Consider the following statements regarding electro-dynamometer type indicating instrument It can be used for measuring

1. Direct current
2. Alternating current
3. Direct voltage
4. Alternating voltage

Of these statements

View solution

Q. The advantage of LVDT over inductive bridge type transducer is that

View solution

Q. In a Weston synchronoscope the deflecting torque is zero when

View solution

Q. Assertion (A): Megger is used to check insulation resistance of cables.

Reason (R): Insulation resistance of cables is very high.

View solution

Q. Assertion (A): A power factor meter operates on dynamometer principle.

Reason (R): A power factor meter does not have a control spring.

View solution

Q. Assertion (A): A radiation pyrometer is very suitable for high temperature measurement.

Reason (R): When temperature is high, a physical contact between hot body and thermometer is not desirable.

View solution

Q. Burden of an instrument transformer is expressed in

View solution

Q. Which of the following devices should be used for accurate measurement of a low dc voltage?

View solution

Q. An electrodynamometer instrument has the advantage of

View solution

Q. The dimensions of permittivity are

View solution

Q. It is required to measure a low magnitude high frequency current. The proper instrument is

View solution

Q. Bridge circuits using RTD in temperature measurement usually employ 3 lead system so as to obtain

View solution

Q. The stator of phase shifting transformer for use in conjunction with an ac potentiometer has a

View solution

Q. The sensitivity of a potentiometer can be increased by

View solution

Q. Two resistances are R1 = 36 ± 5% and R2 = 75 ± 5%. If they are connected in parallel, the limiting error in percent will be

View solution