# An integrating digital voltmeter measures

1.  True average value

2.  rms value

3.  Peak value

4.  Peak to peak value

4

True average value

Explanation :
No Explanation available for this question

# A 10 V full-scale voltmeter having 100 k-ohm/V sensitivity is used to measure the output of  a photovoltaic cell having an internal resistance of 1 M-ohm. The voltmeter reads 5 V. the voltage generated by the photovoltaic cell is

1.  4 V

2.  10 V

3.  Greater than 5 V but less than 10 V

4.  Greater than 10 V

4

10 V

Explanation :
No Explanation available for this question

# In a reed type frequency meters all the reeds

1.  Have the same natural frequency

2.  Have different natural frequency

3.  Have different natural frequency but the different in natural frequency adjacent reeds is  Hz

4.  None of these

4

Have different natural frequency but the different in natural frequency adjacent reeds is  Hz

Explanation :
No Explanation available for this question

# A 53 Hz reed type frequency meter is polarized with d.c. The new range frequency meter is

1.  106 Hz

2.    26.5 Hz

3.     53 Hz

4.     none of these

4

106 Hz

Explanation :
No Explanation available for this question

# An average reading VTVM  use one diode connected in series with an external resistance. A high value of series resistance is used so that the instrument should have

1.  A high input impedance

2.  A linear v-I characteristics

3.  Low power consumption

4.  All of these

4

All of these

Explanation :
No Explanation available for this question

# In a compensated shunt type peak reading VTVM a bucking battery with a series adjustable resistance is used for

1.  Providing power for the circuit

2.  Zero setting

3.  The purpose of amplifying low level signal

4.  All of these

4

All of these

Explanation :
No Explanation available for this question

# In a source follower type electronic voltmeter, the transconductance of FETs is 0.005 mho and resistance of the meter is 100 . The approximated value of current through the meter, when the input voltages is 1 V, is

1.  2.5 mA

2.       5 mA

3.      2 mA

4.       1 mA

4

2 mA

Explanation :
No Explanation available for this question

# Electronic voltmeters which use rectifiers employ negative feedback. This is done to

1.  Increase the overall gain

2.  Improve stability

3.  Overcome non linearity of diodes

4.  None of these

4

Overcome non linearity of diodes

Explanation :
No Explanation available for this question

# A voltage having symmetrical square wave shape is applied to an average reading voltmeter with scale calibrated in terms of rms value of a sinusoidal wave has an error of

1.  -3.9%

2.      +3.9%

3.     -11%

4.     +11%

4

+11\%

Explanation :
No Explanation available for this question

# In an electronic ohmmeter, an OP-AMP is used as a

1.  Summer

2.     Multiplier

3.       Buffer amplifier

4.    Integrator

4