1) If the bombardment of electrons ceases i.e. when the signal becomes zero then the light emitted by the screen will
a. Disappear immediately
b. Persist for some time then it will disappear
c. Will not disappear at all
d. None of these
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Answer
Explanation
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ANSWER: Persist for some time then it will disappear
Explanation:
No explanation is available for this question!
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2) The phase difference between two waveforms in the below figure is given by
a. ∅ = sin -1 Y1 / Y2
b. ∅ = sin -1 Y2 / Y1
c. ∅ = tan -1 Y2 / Y1
d. ∅ = tan -1 Y1 / Y2
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Answer
Explanation
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ANSWER: ∅ = sin -1 Y1 / Y2
Explanation:
No explanation is available for this question!
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3) If the two input waveforms are of equal amplitude and 90 degree phase difference is applied to the CRO then the Lissajous patterns obtained will be
a. Straight line tilted at 45 degree with respect to X - axis
b. Circle
c. Ellipse
d. Vertical straight line
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Answer
Explanation
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ANSWER: Circle
Explanation:
No explanation is available for this question!
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4) The Lissajous patterns help in the measurement of
a. Phase difference between two sine wave
b. Frequency of one waveform if the frequency of other waveform is known
c. Both (a) and (b)
d. None of these
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Answer
Explanation
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ANSWER: Both (a) and (b)
Explanation:
No explanation is available for this question!
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5) In terms of the division on screen, the voltage of the waveform in CRO is
a. Average voltage
b. RMS voltage
c. Peak to peak voltage
d. Maximum voltage
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Answer
Explanation
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ANSWER: Peak to peak voltage
Explanation:
No explanation is available for this question!
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6) The light emitted by the zinc silicate coated fluorescent screen of cathode ray tube is usually of
a. Green colour
b. Yellow colour
c. Blue colour
d. White colour
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Answer
Explanation
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ANSWER: Green colour
Explanation:
No explanation is available for this question!
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7) Which part is called as heart of CRO?
a. CRT
b. Sweep generator
c. Trigger circuit
d. Amplifier
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Answer
Explanation
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ANSWER: CRT
Explanation:
No explanation is available for this question!
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8) The sweep generator of a CRO is used to produce
a. Sinusoidal voltage for the horizontal deflection of electron beam
b. Saw tooth voltage for the vertical deflection of electron beam
c. Sinusoidal voltage for the vertical deflection of electron beam
d. Saw tooth voltage for the horizontal deflection of electron beam
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Answer
Explanation
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ANSWER: Saw tooth voltage for the horizontal deflection of electron beam
Explanation:
No explanation is available for this question!
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9) Principally CRO is a
a. Ammeter
b. Voltmeter
c. Wattmeter
d. Watt - hour meter
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Answer
Explanation
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ANSWER: Voltmeter
Explanation:
No explanation is available for this question!
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10) CRO gives the visual representation of time varying signals. The display of the signal is
a. One dimensional
b. Two dimensional
c. Three dimensional
d. Four dimensional
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Answer
Explanation
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ANSWER: Two dimensional
Explanation:
No explanation is available for this question!
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