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Measurement and Instrumentation

Measurement and Instrumentation
In a CRO which of following is not a part of electron gun?

  X-Y plates
 Grid
 Accelerating anode
 Cathode

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

Current
Resistance
Frequency
Voltage

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Measurement and Instrumentation
Which of following is a vector quantity?

 Relative permeability.
 Flux density.
 Magnetic potential.
 Magnetic field intensity.

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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.
 25.4.
 31.4.
 20.

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Measurement and Instrumentation
The expected value of the voltage across a resistor is 80 V, and the measured value is 79 V. What is the percentage error and relative accuracy of the measurement ?

 1.5% & 98.75%
 1.5% & 99%
 1.25% & 98.75%
 1.25% & 98.25%

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Measurement and Instrumentation
The thermocouple instruments do not have

Independence of ambient temperature
Absence of frequency error
High degree of measuring accuracy
High sensitivity

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