ECE :: Measurements and Instrumentation
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An ammeter of 0-25 A range has a guaranteed accuracy of 1% of full scale reading. The current measured is 5 A. The limiting error is
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The coil of a moving iron instrument has a resistance of 500 Ω and an inductance of 1 H. It reads 250 V when a 250 V dc is applied. If series resistance is 2000 Ω, its reading when fed by 250 V, 50 Hz ac will be
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In a CRO which of the following is not a part of electron gun
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If reference sound pressure P0 is 2 x 10-5 N/m2, a sound pressure of 90 dB is equal to
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Which of the following voltmeters would you use for measuring voltage across 20 kΩ resistance?
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A single phase energy meter has the rating 1200 resolutions/ kWh. If a 500 W electric gadget is used for 4 hours, the energy meter will make
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Assertion (A): De sauty's bridge is suitable only for pure capacitor.
Reason (R): Capacitors are mostly perfect.
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In which of the transformer is the secondary nearly short circuited under normal operating conditions?
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A moving coil instrument has a resistance of 0.6 Ω and full scale deflection at 0.1 A. To convert it into an ammeter of 0-15 A range, the resistance of shunt should be
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