CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Half Wave Rectifier Type Instrument

The sensitivi...

Question

The sensitivity of PMMC instrument is $10 k Ω / V$ . If this instrument is used in rectifier type voltmeter with half wave rectification the sensitivity will become _______ $k Ω / V$
4.5

Open in App

Solution

The correct option is A 4.5
$S_{a c} = 0.45 S_{d c}$ (for half wave rectifier)

$S_{a c} = 0.9 S_{d c}$ (for full wave rectifier)

Here, $S_{d c} = 10 k Ω / V$

$∴ S_{a c} = 0.45 \times 10 = 4.5 k Ω / V$

Suggest Corrections

thumbs-up

1

Similar questions

Q. A rectifier type PMMC voltmeter has a sensitivity of

20 k Ω / V .

A reading of 4.5 V is obtained when measuring a voltage source with an internal resistance on it's 5 V scale. When the scale is changed to 10 V full scale, a reading of 6 V is obtained. The value of the voltage and it's internal resistance R are

Q. Two 100 V full scale PMMC type DC voltmeters having sensitivity of

2 k Ω / V a n d 4 k Ω / V

are connected in series. The series combination can be used to measure a dc voltage of _________V.

Q. A half wave rectifier type AC voltmeter consists of a series resistance

R_{s}

, ideal diode and PMMC instrument as shown in figure. The internal resistance of instrument is

100 Ω

and full scale deflection is produced by a DC current of 10 mA. The value of

R_{s}

required to obtain full scale deflection with an AC voltage of 100 V (rms), applied to the input terminal is _______

Ω

Q. A half wave rectifier type AC voltmeter consists of a series resistance

^{'} R_{e x t}^{'}

, ideal diode 'D' and PMMC instrument as shown in figure. The internal resistance of PMMC meter is

120 Ω

and full scale deflection is produced by a DC current of 1 mA. The value of

^{'} R_{e x t}^{'}

required to obtain full scale deflection with an AC voltage of 10 V (rms), applied to the input terminal is_______

Ω

Q. A rectifier type AC voltmeter consists of a series resistance

R_{s}

an ideal full-wave birdge rectifier and a PMMC instrument as shown in the figure. The internal resistance of the instrument is

100 Ω

and a full scale deflection is produced by a DC current of 1 mA. The value of

R_{s}

. required to obtain full scale deflection with an AC voltage of 100 V(rms)applied of the input terminals is

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Half Wave Rectifier Type Instrument

MEASUREMENT

Watch in App

explore_more_icon

Explore more

Half Wave Rectifier Type Instrument

Other Measurement

Join BYJU'S Learning Program

CrossIcon