Measurement And Instrumentation - Study Mode
[#1] A dc potentiometer is designed to measure up to about 2 V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balance at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of the test cell is
Correct Answer
(B) 1.34 V
[#2] Which one of the following is the best definition of accuracy?
Correct Answer
(D) It is the closeness with which an instrument approaches the true value of the quantity being measured
[#3] A coil is tuned to resonance at 500 kHz with a resonating capacitor of 36 pF. At 250 kHz, the resonance is obtained with resonating capacitor of 160 pF. What is the self-capacitance of the coil?
Correct Answer
(B) 5.33 pF
[#4] A resistance strain gauge is cemented to a steel member, which is subjected to a strain of 2 × 10 -6 . If the original resistance is 100 Ω and change in resistance is 600 µΩ, the gauge factor will be
Correct Answer
(A) 3
[#5] The moving coil in a dynamometer wattmeter is connected
Correct Answer
(B) Across the supply