ECE :: Measurements and Instrumentation
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The current in a circuit is measured using a 150 : 1 CT If the ammeter reads 0.6 A, the circuit current is
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A Hall effect transducer has KH = - 1 x 10-8. If B = 1 Wb/m2, I = 3 A and bismuth slab is 2 mm wide, the Hall voltage is
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Two ammeters A and B both 0-10 A have internal resistance of 1 Ω and 0.5 Ω respectively. They are connected in parallel. If total current is 15 A, then
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Which of the following is not correct?
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The loss of charge method can be used to measure
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Assertion (A): Maxwell bridge is for measuring inductance of medium magnitude.
Reason (R): In Maxwell's bridge the unknown inductance is measured by comparing it with a capacitance.
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Assertion (A): A semiconductor strain gauge is more accurate than a resistance strain gauge.
Reason (R): The gauge factor of a semiconductor strain gauge is about 100 where as the gauge factor of a resistance strain gauge is only about 2.
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The resistance of a dc galvanometer is 20 Ω. A current of 10 mA causes full scale deflection. To convert it into 0-300 V voltmeter, we have to use a series resistance of
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