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Measurement and Instrumentation

Measurement and Instrumentation
Which of the following are integrating instruments?

Voltmeters
Wattmeters
Ammeters
Ampere hour and watt hour meters

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Measurement and Instrumentation
The material of the shunt should have _______ temperature co-efficient of resistance.

Positive
Negligible
Negative
None of the listed here

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Measurement and Instrumentation
When testing a coil having a resistance of 10 ohms, resonance occurred when the oscillator frequency was 10 MHz and rotating capacitor was set at 500/2π pF. The effective value of the Q of the coil is

 20.
 31.4.
 54.2.
 25.4.

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Measurement and Instrumentation
On a simple ohmmeter, the 0 Ω mark is _______ of the scale.

In the middle
None of the listed here
Far left
Far right

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Measurement and Instrumentation
The total current I = I1 + I2 in a circuit is measured I1 = 150 ± 3A , I2 = 250 ± 4 A, where the limits of error are given as standard deviations. I is measured as

 (400 ± 1) A
 (400 ± 2.24) A
 (400 ±5) A
 (400 ± 3) A

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Measurement and Instrumentation
Deflection method direct measurements are most widely used as these are

 least time consuming.
 most simple and least time consuming.
 most simple.
 most accurate.

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