PMMC measuring Instrument reading

[jaus tail]

Homework Statement

Homework Equations

For question 14
PMMC measures average value
MI measures RMS value

The Attempt at a Solution

I think PMMC should give 0 V But book answer is B i.e 1 V (where am I wrong?)
and MI should give 1.414 V. For this book answer matches my answer.

 

[cnh1995]

I think the question is flawed.
If the diodes are considered to be ideal:
Two diodes on the same side (either left or right) of the voltmeter get forward biased simultaneously and short the supply.
At the same time, the reverse biased diode pair effectively disconnects the voltmeter terminal connected to it from the voltage source.

I guess this was meant to be a diode bridge and got printed incorrectly.

 

[cnh1995]

I guess this was meant to be a diode bridge and got printed incorrectly

And if it were a diode bridge, the PMMC meter would indeed read 1V, not 0V.

 

[jaus tail]

By diode bridge you mean full wave rectifier bridge?

I think if input is square wave then Voltmeter should read average which is 1 V
MI should read rms which will be 1.414 V