A microameter has a resistance of `100 omega` and a full scale range of ` 50 muA`. It can be used as a voltmeter or as a higher range ammeter provides a resistance is added to it . Pick the correct range and resistance combination(s)A. 50 V range with `10kOmega` resistance in seriesB. `10V` range with `200kOmega` resistance in seriesC. `5mA` range with `1Omega` resistance in parallelD. 10 mA range with `1Omega` resistance in parallel

A microameter has a resistance of `100 omega` and a full scale range o

1.	A microameter has a resistance of `100 omega` and a full scale range of ` 50 muA`. It can be used as a voltmeter or as a higher range ammeter provides a resistance is added to it . Pick the correct range and resistance combination(s)A. 50 V range with `10kOmega` resistance in seriesB. `10V` range with `200kOmega` resistance in seriesC. `5mA` range with `1Omega` resistance in parallelD. 10 mA range with `1Omega` resistance in parallel
Answer» Correct Answer - B::C To increases the range of ammeter a parallel resistance (called shunt) is requried which is given by `S=((i_(g))/(i-i_(g)))G` for option (c) `S=((50xx10^(-6))/(5xx10^(-3)-50xx10^(-6)))(100)=1Omega` To change it into voltmeter, a high resistance `R` is put in series where R is given by `R=(V)/(i_(g))-G` For option (b) `R=(10)/(50xx10^(-6))-100=200kOmega`

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