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Measurement and Instrumentation

Measurement and Instrumentation
In a dynamometer wattmeter, the moving coil is the

Current coil
None of the listed here
Current coil and potential coil
Potential coil

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Measurement and Instrumentation
A sampling wattmeter is used to measure the average power of a load. The peak to peak voltage of a square wave is 10 V and the current is triangular wave of 5 Amp P-P as shown in the figure. The period is 20 ms. The reading in W will be

  0 W.
 50 W.
 100 W.
 25 W.

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Measurement and Instrumentation
What is the approximate input impedance of a CRO?

 100 MΩ
 0
 10 MΩ
 1 MΩ

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

Resistance
Voltage
Frequency
Current

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Measurement and Instrumentation
A CRO can display

Time invariant signals
AC signals
DC signals
Both AC and DC signals

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Measurement and Instrumentation
When a capacitor was connected to the terminal of ohmmeter, the pointer indicated a low resistance initially and then slowly came to infinity position. This shows that capacitor is

Short-circuited
All right
None of these
Faulty

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