A potentiometer wire of length 10 m and resistance 10 Q is connected in series with a resistance box and a cell of e.m.f 2 V and negligible internal resistance. What resistance must kept in the box if the potential drop across the wire is to be 10 mV ? What is the potential gradient in mV per mm ?
A potentiometer wire of length 10 m and resistance 10 Q is connected in series with a resistance box and a cell of e.m.f 2 V and negligible internal resistance. What resistance must kept in the box if the potential drop across the wire is to be 10 mV ? What is the potential gradient in mV per mm ?
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Transcribed Image Text:A potentiometer wire of length 10 m
and resistance 10 N is connected in series with
a resistance box and a cell of e.m.f 2 V and
negligible internal resistance. What resistance
must kept in the box if the potential drop
across the wire is to be 10 mV ? What is the
potential gradient in mV per mm ?
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