Explore topic-wise MCQs in Electrical Engineering Questions.

A null type of bridge with DC excitation is commonly known as

What will happen if the current coil & potential coil of dynamometer type wattmeter is interchanged?

An electrolytic ampere hour meter can be converted into watt - hour meter by

Which part is called as heart of CRO?

In Wheatstone bridge method, the instrument used as null detector is

In Maxwell’s Inductance - Capacitance bridge, the frequency ω

If the two input waveforms are of equal amplitude and 90 degree phase difference is applied to the CRO then the Lissajous patterns obtained will be

In a Wheatstone bridge method, the bridge is said to be balanced, when the current through the galvanometer is

The Maxwell’s Inductance - Capacitance bridge is not suitable for the measurement inductance of coil if the Q factor is

The induction type single - phase watt - hour meters uses

To produce a change in deflection of 1.5 mm of the galvanometer of Wheatstone bridge, a change of 5 Ω in the unknown arm of bridge is required. The sensitivity is

The spring which is used for producing controlling torque in indicating instruments are made up of materials which is / are

Resolution of an instrument is specified as an

The sensitivity of the bridge is maximum when

In induction watt - hour meter, due to shunt magnet the torque is not zero power factor. It can be compensated by using

Anderson bridges is suitable for the measurement of

Potentiometric transducers are used for the measurement of

In radiation methods, the detector system is located

Hot - wire instruments are suitable for

The resistances of the various arms of Wheatstone bridge are P = 500 ohm, Q = 50 ohm, R = 1010 ohm and S = 100 ohm. The emf of the batter is 5 V and the current sensitivity of galvanometer is 8 mm / μ A. If the internal resistance of the galvanometer is 80 ohm then the deflection of galvanometer and the sensitivity of the bridge in terms of deflection per unit change of resistance are

If the reading of one wattmeter is four times the other wattmeter while measuring the input power of 3 phase induction motor then the power factor of the load will be

A vibrating level sensors consist of

X - Y recorder is the type of

The scales of gravity controlled instruments are

The displacement measuring instruments is / are

In fibre - optic level sensors, the amount of light loss depends on

Potentiometer is used for the measurement of

The measurements which can be simplified by using X - Y recorders is / are

The two wattmeters used for the measurement of power input read 50 kW each. What will be the readings of the two wattmeters if the power factor is changed to 0.8 leading keeping the total input power same?

Resolver works on the principal of mutual inductance variation. It is mainly used for the measurement of

In rotary variable differential transformer, the mutual inductance between the primary and secondary coils varies

In electrostatic voltmeters, the principle of their operation is the force of attraction between electric charges on neighboring plates between which potential difference is maintained. The attracted - disc type electrostatic instruments are used for the measurement of

In electrostatic instruments iron is not used for construction. These instruments are

When a 100 V moving iron voltmeter is of accuracy class 1 - 0 is used in a circuit, it reads 50 V. Then the maximum possible percentage error in the reading is

If the resistance in a circuit is given by 80 Ω ± 0.2% and the current flowing through it is 5A ± 0.1%, then the uncertainty in the power will be

In a measurement system,

While measuring resistance by the voltmeter - ammeter method, the maximum possible percentage error in the voltmeter and ammeter are ± 1.8% and ± 1.2% respectively. Then the maximum possible percentage error in the value of resistance will be

Optical sensors used for the displacement measurement works on the principal that

The detectors used in optical sensors is

Capacitance sensor can measure very small displacement. It can be formed by varying