Two units of DC voltmeters, A and B are used to measure a voltage from a resistor R2 as in Figure Q4 (b). These instrument specifications are stated as below: Meter A: Sensitivity S = 3 kN/V, Internal Resistance Rm = 0.5 kN, Range = 15 V Meter B: Sensitivity S = 15 kN/V, Internal Resistance Rm = 3 kN, Range = 20 V Ri=5kQ 30 V RF 25k2. Figure Q4(b) Calculate: (i) Voltage across R2 without any instrument connected. (ii) Voltage across R2 using instrument A. (iii) Voltage across R2 using instrument B. [2
Two units of DC voltmeters, A and B are used to measure a voltage from a resistor R2 as in Figure Q4 (b). These instrument specifications are stated as below: Meter A: Sensitivity S = 3 kN/V, Internal Resistance Rm = 0.5 kN, Range = 15 V Meter B: Sensitivity S = 15 kN/V, Internal Resistance Rm = 3 kN, Range = 20 V Ri=5kQ 30 V RF 25k2. Figure Q4(b) Calculate: (i) Voltage across R2 without any instrument connected. (ii) Voltage across R2 using instrument A. (iii) Voltage across R2 using instrument B. [2
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Transcribed Image Text:(b)
Two units of DC voltmeters, A and B are used to measure a voltage from a resistor R2 as in
Figure Q4 (b).
These instrument specifications are stated as below:
Meter A: Sensitivity S = 3 kN/V, Internal Resistance Rm = 0.5 kN, Range = 15 V
%3D
Meter B: Sensitivity S = 15 kN/V, Internal Resistance Rm = 3 kN, Range = 20 V
%3D
Ri=5kQ
30 V
RF 25k2
Figure Q4(b)
Calculate:
(i)
Voltage across R2 without any instrument connected.
(ii)
Voltage across R2 using instrument A.
(iii)
Voltage across R2 using instrument B.
(iv)
Absolute error for each measurement.
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