Electronic measurements and instrumentation miscellaneous
- Which of the following frequency meters is suitable for measuring radio frequency?
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Hetrodyne frequency meter is suitable for measuring RF (radio frequency).
Correct Option: D
Hetrodyne frequency meter is suitable for measuring RF (radio frequency).
- A meter has a full-scale angle of 90° at a current of 1 A. This meter has perfect square-law response. What is the current when the deflection is 45°?
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Required current
I′ = I sin 45°= 1 × 1 √2
= ·707Correct Option: C
Required current
I′ = I sin 45°= 1 × 1 √2
= ·707
- The purpose of the delay line is to retard the arrival of the input waveform at the:
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The purpose of the delay line is to retard the arrival of the input waveform at the vertical deflection plates until the sweep is started.
Correct Option: A
The purpose of the delay line is to retard the arrival of the input waveform at the vertical deflection plates until the sweep is started.
- In a constant voltage transformer (CVT), the output voltage remains constant due to:
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In a constant voltage transformer (CVT), the output voltage remains constant due to tapped windings.
Correct Option: D
In a constant voltage transformer (CVT), the output voltage remains constant due to tapped windings.
- Instrument transformers are known to introduce magnitude and phase errors in measurements. These are primarily due to:
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Instrument transformers are known to introduce magnitude and phase errors in measurements. These are primarly due to open and short circuit parameters of the instrument transformers.
Correct Option: C
Instrument transformers are known to introduce magnitude and phase errors in measurements. These are primarly due to open and short circuit parameters of the instrument transformers.
