Question
Download Solution PDFThe range of a moving iron ammeter can be extended by using a ___________.
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExtension of moving iron ammeter
The range of a moving iron ammeter can be extended by using a low value of shunt resistance connected in parallel with an ammeter.
\(R_{sh}(I-I_m)=R_mI_m\)
\(R_{sh}={R_mI_m\over (I-I_m)}\)
\(R_{sh}={R_m\over ({I\over I_m}-1)}\)
\(R_{sh}={R_m\over ({m}-1)}\)
Extension of moving iron voltmeter
The range of a moving iron voltmeter can be extended by using a high value of multiplier resistance connected in series with a voltmeter.
\(R_{se}=R_m({V\over V_g}-1)\)
Last updated on May 29, 2025
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