Q. 79 A rectifier type ac voltmeter of a series resistance
, an ideal full-wave rectifier
bridge and a PMMC instrument as shown in figure. The internal. resistance of
the instrument is 
and a full scale deflection is produced by a dc current
of 1 mA. The value of 
required to obtain full scale deflection with an ac
voltage of 100 V (rms) applied to the input terminals is 
Answer:(C)
Explanation:
