11. 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
12. Which one of the following is the best definition of accuracy?
13. 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?
14. 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
15. The moving coil in a dynamometer wattmeter is connected
16. The expected value of voltage across a resistor is 80 V. however, the measurement gives a value of 79 V. Then % error and relative accuracy are-
17. T = Ki is the torque equation of a
18. Resolution of an instrument is
19. The arrangement shown in the given figure represents an RC potentiometer for measuring ac voltage. What should be the value of C so that V0/Vin is independent of the frequency of the input signal?
20. For the given Lissajous figure Find fy, if fx is 1200 Hz
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