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Measurement and Instrumentation

Measurement and Instrumentation
A 10MHz CRO has

5MHz sweep
10MHz vertical oscillator
10MHz horizontal oscillator
10MHz supply frequency

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Measurement and Instrumentation
In a single phase energy meter, braking torque is provided by

None of the listed here
Fluid friction
Air friction
Permanent magnet

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Measurement and Instrumentation
Purely mechanical instrument cannot be used for dynamic measurements because they have

 high inertia.
 large time constant.
 higher response time.
All of these

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Measurement and Instrumentation
Which instrument has identical calibration for ac as well as dc values?

Moving coil type
Moving iron type
Induction type
Hot wire type

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Measurement and Instrumentation
In which of the transformer is the secondary nearly short circuited under normal operating condition?

 PT.
 Distribution transformer.
 Power transformer.
 CT.

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Measurement and Instrumentation
To measure 5 volts, if one selects a 0-100 volt range voltmeter which is accurate with in ± 1%, then the error in this measurement may be up to

 ± 7.5 %
 ± 1.5%
 ± 20%
 ± 2.5%

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