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Measurement and Instrumentation

Measurement and Instrumentation
With a sweep time 10ms across the screen the approx. horizontal sawtooth frequency will be

100Hz
50Hz
500Hz
1kHz

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Measurement and Instrumentation
Which of the following devices should be used for accurate measurement of low D.C. voltage?

C. potentiometer
Small range thermocouple voltmeter
Small range moving coil voltmeter
None of these

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Measurement and Instrumentation
Comparison methods are used

 because they are expensive.
 because they are most simple.
 when a high accuracy of measurement is required.
 because they take least time in measurement.

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

Current
Resistance
Voltage
Frequency

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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

 54.2.
 31.4.
 20.
 25.4.

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Measurement and Instrumentation
Which one the following statements is correct? The application of the instrument in wrong manner in the procedure of measurement results in a/an

 random error
 systematic error
 gross error
 instrument error

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