Electrical Measurements | Electrical two mark question Answer - part 2

Define electrical energy. State its unit.

Ans:

Electrical Energy: 

Electrical energy is defined as the work done in moving electrical charge in electrical field.

OR

The total power delivered or consumed by electrical load over specific unit time duration.

Unit of Electrical Energy:

The unit of electrical energy is the joule (or watt-second) OR Kilowatt-hour ( kWH ).

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State the meaning of energy meter constant K. State its unit.

Ans:

Meaning of Energy Meter Constant (K): Energy Meter Constant is the no. of revolutions made by disc in meter per unit (kWh)

consumption of energy. Unit of energy meter constant K is  rev/kWH

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Give ranges of low and high resistances. 

Ans:

1) Ranges of low resistance: Less than 1 ohm.

2) Ranges of high resistance: Greater than 0.1 Mega ohm. 

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State the use of synchroscope.

Ans:

Use of Synchroscope:   

The synchroscope is used to determine the exact instant of switching required to connect the alternators in parallel or put an alternator in parallel with the infinite bus. Its pointer gives the idea of the faster or slower machine to make adjustments in speed of alternators for synchronizing. 

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Give application of C.R.O.

Ans:

Applications of CRO: 

1) Voltage measurement.

2) Current measurement.

3) Measurement of phase difference.

4) Measurement of phase.

5) Measurement of frequency.

6) Measurement of inductance. 

7) Measurement of capacitance.

8) Tracing the waveform.

9) Measurement of amplitude of variable quantity.

10) Used in television circuits.

11) Used in radar circuits

12) It can display different types of waveforms.

13) For finding B-H curves.

14) For studying the heart beats 

15) To detect standing waves in transmission lines

16) To check faulty components in various circuits.

17) For checking transistor.

18) It can measure short time interval. 

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