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- 1. Multiple Choice
X-plates is
positioned vertically to deflect the electron beam in horizontal direction
positioned horizontally to deflect the electron beam in vertical direction
- 2. Multiple Choice
Figure shows two pulses on a CRO. The pulses are caused by two consecutive signals detected by a microphone connected to the CRO.
Calculate the time lapse between the signals if the timebase setting is 4 ms cm -1.
1.208 second
0.1208 second
0.00208 second
0.0208 second
- 3. Multiple Choice
Diagram shows a waveform displayed on the screen of a cathode ray oscilloscope (C.R.O.). Which of the following control switch needs to be switched on to display this waveform?
intensity
time-base
Y-gain
Y-shift
- 4. Multiple Choice
Diagram shows a trace on the screen of a C.R.O. when a signal is connected across the Y-input. What type of signal is applied across the Y-input and what is the condition of the time-base?
alternating current, switched off
direct current, switched off
alternating current, switched on
direct current, switched on
- 5. Multiple Choice
Diagram shows the trace displayed on the screen of a C.R.O. with the time-base set to 10 ms/div. What is the frequency, f of the wave?
5 Hz
25 Hz
40 Hz
50 Hz
- 6. Multiple Choice
Diagram shows a waveform displayed on the screen of a C.R.O. If the controls on the C.R.O. are set at 0.5 V/div and 2 ms/div, find the peak voltage and the frequency of the input signal.
4 V, 2 Hz
5 V, 10 Hz
2 V, 100 Hz
4 V, 100 Hz
- 7. Multiple Choice
Diagram shows part of C.R.O. What is Q?
Control grid
Focusing anode
Accelerating anode
Cathode
- 8. Multiple Choice
What you need to control in order to adjust the brightness of the signal in C.R.O.?
Focusing anode
Control grid
Accelerating anode
Cathode
- 9. Multiple Choice
What you need to control in order to adjust the resolution (sharpness) of the signal in C.R.O.?
Control grid
Focusing anode
Accelerating anode
Cathode
- 10. Multiple Choice
Which of the following C.R.O. setting will produce the following signal?
1.5 V dry cell connected, time-base on
1.5 V dry cell connected, time-base off
1.5 V a.c. supply connected, time-base on
1.5 V a.c. supply connected, time-base off
- 11. Multiple Choice
Which of the following C.R.O. setting will produce the following signal?
1.5 V dry cell connected in reverse, time-base off
1.5 V dry cell connected in reverse, time-base on
1.5 V dry cell connected, time-base off
1.5 V dry cell connected, time-base on
- 12. Multiple Choice
Which of the following C.R.O. setting will produce the following signal?
1.5 V dry cell connected, time-base on
1.5 V dry cell connected, time-base off
1.5 V dry cell connected in reverse, time-base on
1.5 V dry cell connected in reverse, time-base off
- 13. Multiple Choice
Which of the following C.R.O. setting will produce the following signal?
2 V dry cell connected, time-base off
2 V a.c. supply connected, time-base off
2 V dry cell connected, time-base on
2 V a.c. supply connected, time-base on
- 14. Multiple Choice
Which of the following is wrong about the uses of C.R.O.?
To measure potential difference
To measure short time intervals
To display waveforms
To measure current
- 15. Multiple Choice
What is the function of time-base knob on C.R.O.?
To control brightness of the bright spot
To control the sharpness of the bright spot
To control the magnitude of vertical deflection of the bright spot
To control the magnitude of horizontal deflection of the bright spot
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