41. A voltmeter is connected in a ___________ with the circuit component across which potential difference is to be measured.
42. The slewing speed of X-Y recorder is
43. The resistance of LDR ____________ when exposed to radiant energy.
44. Fiber optic sensor can be used to sense ____________.
45. Most commonly used indicator electrode is
46. To reduce common mode interference during recording of bio signals one can use __________.
47. A series ohmmeter circuit uses a 3 V battery and a 1 mA meter movement. What is the half-scale resistance for this movement?
48. The size of air cored transducers in comparison to the iron core parts is
49. pH value of venous blood is
50. The resolution limit of electron microscope is
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