A voltmeter is connected in a ___________ with the circuit component across which potential difference is to be measured.

A voltmeter has a resistance of G ohms and range V volts. The value of resistance required in series to convert it into voltmeter of range nV is ___________.

A

nG

B

$$\frac{{\text{G}}}{{\text{n}}}$$

C

$$\frac{{\text{G}}}{{{\text{n}} - 1}}$$

D

(n - 1)G

A voltmeter is connected across the current path.

A

True

B

False

Pressure difference between two points in vessels, pipelines or in two different pipelines can be measured by a differential manometer. The pressure difference measured as the mm of water coloumn in case of mercury-water, differential manometer is equal to (where, H = difference in height of mercury column in mm).

A

H

B

12.6 H

C

13.6 H

D

14.6 H

The current coil of a wattmeter is connected to the CT of R-phase. The potential coil is connected across Y and B phases. The wattmeter measures

A

Active power in R phase

B

Active power of Y phase

C

Reactive power of R phase

D

Power proportional to 3 phase power if the load is balanced

Which of the following is measured by using a vector voltmeter ?

A

Amplifier gain and phase shift

B

Filler transfer functions

C

Complex insersion loss

D

All of the above

On which of the following voltage range settings will a voltmeter present the minimum load on a circuit?

A

1 V

B

50 V

C

500 V

D

1,000 V

The higher the range setting, the less the internal resistance and the greater the load effect of the voltmeter on a circuit.

A

True

B

False

When liquid and vapour phase of multi-component system are in equilibrium (at a given temperature and pressure), then chemical potential of each component is

A

Same in both the phases

B

Zero in both the phases

C

A voltmeter is connected in a ___________ with the circuit component across which potential difference is to be measured.

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