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- Subject
- Electronic instrumentselectrical-engineering-mcqs › electronic-instruments
- Published
- 22 Dec 2018
- Last updated
- 28 May 2026
Explanation
Increasing the negative voltage on the control grid reduces the flow of electrons striking the screen, which causes the spot's brightness to decrease.
More Electronic instruments MCQs
Practice related questions from the same subject.
- 1.An ammeter with a resistance of G ohms and a maximum current range of I amperes needs to be modified to measure up to n times the original current (nI). What should be the value of the resistance connected in parallel to achieve this new range?
- 2.What parameters can a Cathode Ray Oscilloscope (CRO) measure?
- 3.A voltmeter with an internal resistance of G ohms and a voltage range of V volts needs to be modified to measure up to nV volts. What resistance should be connected in series to achieve this new range?
- 4.Which device among the following typically exhibits the highest electrical resistance?
- 5.What is the resistance value of a perfect voltmeter?
- 6.What should be the value of the shunt resistance if a galvanometer with resistance G is to carry only 2% of the total current?
- 7.Which type of waveform is applied to the horizontal plates of a CRO to display the signal waveform properly?
- 8.What is the resistance value of an ideal ammeter?
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