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MCQs

Total Questions : 146 | Page 14 of 15 pages
Question 131. X and Y plates of a CRO are connected to unequal voltages of equal frequency with phase shift of 90°. The Lissajous figure on the screen will be?
  1.    Circle
  2.    Straight line
  3.    Ellipse
  4.    Figure of eight
 Discuss Question
Answer: Option C. -> Ellipse
Answer: (c).Ellipse
Question 132. An oscilloscope indicates ___________
  1.    The peak to peak value of the voltage
  2.    DC value of the voltage
  3.    Rms value
  4.    Average value
 Discuss Question
Answer: Option A. -> The peak to peak value of the voltage
Answer: (a).The peak to peak value of the voltage
Question 133. The two inputs of a CRO are fed with two stationary periodic signals. The figure changes from ellipse to circle and back to ellipse with its major axis changing orientation slowly and repeatedly. The following inference can be made from this.
  1.    The signals are not sinusoidal in nature
  2.    The amplitudes of the signals are very close but not equal
  3.    The signals are sinusoidal with their frequencies very close but not equal
  4.    There is a constant but small phase difference between the signals
 Discuss Question
Answer: Option D. -> There is a constant but small phase difference between the signals
Answer: (d).There is a constant but small phase difference between the signals
Question 134. A CRO uses _________
  1.    Electromagnetic focusing
  2.    Electrostatic focusing
  3.    Both Electrostatic and Electromagnetic focusing
  4.    No focusing technique
 Discuss Question
Answer: Option B. -> Electrostatic focusing
Answer: (b).Electrostatic focusing
Question 135. To the Y input of a CRO, we feed a signal defined by 10sin100t, to the X-input, we feed signal 10cos100t. The gain for both X channel and Y channel is the same, the screen will show?
  1.    Sinusoidal signal
  2.    A straight line
  3.    An ellipse
  4.    A circle
 Discuss Question
Answer: Option D. -> A circle
Answer: (d).A circle
Question 136. A CRO probe has an impedance of 500 kΩ in parallel with a capacitance of 10 pF. The probe is used to measure the voltage between P and Q as shown in the figure. The measured voltage will be?A CRO Probe Has An Impedance Of 500 KΩ In Parallel With A ...
  1.    3.53 V
  2.    3.47 V
  3.    5.54 V
  4.    7.00 V
 Discuss Question
Answer: Option B. -> 3.47 V
Answer: (b).3.47 V
Question 137. What provides a periodic voltage waveform?
  1.    sweep generator
  2.    voltmeter
  3.    oscillator
  4.    amplifier
 Discuss Question
Answer: Option A. -> sweep generator
Answer: (a).sweep generator
Question 138. Vertical deflection is given by ________
  1.    y = Kᵧ Vᵧ
  2.    y = Kᵧ
  3.    x = 1
  4.    y = Vᵧ
 Discuss Question
Answer: Option A. -> y = Kᵧ Vᵧ
Answer: (a).y = Kᵧ Vᵧ
Question 139. Visible spot must be moved in _______
  1.    two directions
  2.    one direction
  3.    three directions
  4.    four directions
 Discuss Question
Answer: Option B. -> one direction
Answer: (b).one direction
Question 140. Horizontal deflection is given by ________
  1.    x = Kₓ
  2.    x = Vₓ
  3.    x = 1
  4.    x = Kₓ Vₓ
 Discuss Question
Answer: Option D. -> x = Kₓ Vₓ
Answer: (d).x = Kₓ Vₓ

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