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How is 11.87 V displayed on a 10 V range for a 4 digit display?

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How is 11.87 V displayed on a 10 V range for a 4 digit display?

(a) 11.870

(b) 1.1870

(c) 118.7

(d) 0.1187

I have been asked this question during an interview.

My query is from Resolution and Sensitivity topic in portion Electronic Instruments of Electrical Measurements

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Best answer
Right choice is (a) 11.870

To explain I would say: The resolution of a DVM is,

R = ^1⁄10^n

Here, n is 4. Substituting n=4 in the equation for resolution we get,

R = ^1⁄10^4 = 10^-4 = 0.0001

Since there are 5 digit places in the resolution, 11.87 which already has four digits is represented as 11.870.

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