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Measurement and Instrumentation

Measurement and Instrumentation
Which of the following cannot be measured by multimeters?

Current
Voltage
Frequency
Resistance

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Measurement and Instrumentation
The resistance of a circuit is found by measuring current flowing and the power fed into the circuit. If the limiting errors in the measurement of power and current are ± 1.5% and ± 1.0% respectively, the limiting error in the measurement of resistance

 ± 2.5%
 ± 1.5%
 ± 1%
 ± 3.5%

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Measurement and Instrumentation
A wheatstone bridge cannot be used for precision measurements because errors are introduced into on account of

 Thermoelectric emfs.
 Contact resistance.
 All of above.
 Resistance of connecting leads.

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Measurement and Instrumentation
The transfer instrument which is used for standardization of a polar type AC potentiometer is

 a dynamometer instrument.
 a thermal instrument.
 an electrostatic instrument.
 a moving coil instrument.

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Measurement and Instrumentation
For measurement on high voltage capacitors, the suitable bridge is

Wein bridge
Modified De santy's bridge
Any of the listed here
Schering bridge

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Measurement and Instrumentation
A moving coil ammeter has a uniform scale with 50 division and gives a full scale reading 10 A. The instrument can read up to (1/5)th of a scale division with a fair degree of certainty. What is the resolution of the instrument in mA?

 25 mA.
  40 mA.
 80 mA.
 50 mA.

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