SSC JE Electrical Engineering 23 Jan 2018 Evening Paper

Question : 143 of 200

Marks: +1, -0

A PM M C type voltmeter, having a full scale reading of 250 V and an internal resistance of 400 kilo-ohms, is connect with a series resistance of 100 kilo-ohms. Calculate the sensitivity of the voltmeter (in Ohms/Volts).

2400
2000
20000
24000

Validate

Solution:

Sensitivity

= 1/\text"full scale current"

Sensitivity

=\text"Internal Resistance"/\text"full scale voltage reading"

={400×10^3}/250

= 2000 Ω / volt

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