1
GATE EE 1993
MCQ (Single Correct Answer)
+1
-0.3
A metal strain gauge has gauge factor of two, it's nominal resistance is $$120$$ Ohms. It is undergoes a strain of $${10^{ - 5}},$$ the value of change of resistance in response to the strain is
A
$$240\,$$ Ohms
B
$$2 \times {10^{ - 5}}\,\,$$ Ohms
C
$$2.5 \times {10^{ - 3}}\,\,$$ Ohms
D
$$1.2 \times {10^{ - 3}}\,\,$$ Ohms
2
GATE EE 1992
MCQ (Single Correct Answer)
+1
-0.3
A resistance is measured by the voltmeter- ammeter method employing d.c. excitation and a voltmeter of very high resistance connected directly across the unknown resistance. If the voltmeter and ammeter readings are subject to maximum possible errors of $$ \pm 2.4\% $$ and $$ \pm 1.0\% $$ respectively, then the magnitude of the maximum possible percentage error in the value of resistance deduced from the measurement is nearly
A
$$1.4$$%
B
$$1.7%$$%
C
$$2.4$$%
D
$$3.4$$%
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