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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
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
- 3. 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
- 4. 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
- 5. 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
- 6. Multiple Choice
Diagram shows part of C.R.O. What is Q?
Control grid
Focusing anode
Accelerating anode
Cathode
- 7. 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
- 8. 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
- 9. 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
- 10. 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
- 11. 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
- 12. 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
- 13. 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
- 14. 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
- 15. Multiple Choice
Tick the statement about uses of CRO. Your answer may have more than 1.
measure potential difference using the C.R.O.
measure short time intervals using the C.R.O.
display wave forms using the C.R.O.
- 16. Multiple Choice
This is observed on a screen when
an a.c. power supply is connected to the Y-input and the timebase is switched off
an a.c. power supply is connected to the Y-input and the timebase is switched on
a d.c. power supply is connected to the Y-input and the timebase is switched off
a d.c. power supply is connected to the Y-input and the timebase is switched on
- 17. Multiple Choice
Figure shows a wave form obtained from a signal generator connected to the Y-input of a CRO.
Below are the settings on the CRO
Y-gain setting = 3 V cm-1
Timebase setting = 5 ms cm -1
Determine the period of the signal
0.002 s
0.01 s
0.02 s
0.03 s
- 18. Multiple Choice
Figure shows a wave form obtained from a signal generator connected to the Y-input of a CRO.
Below are the settings on the CRO
Y-gain setting = 3 V cm-1
Timebase setting = 5 ms cm -1
Determine the frequency of the signal
40 hz
50 hz
60 hz
70 hz
- 19. Multiple Choice
Diagram shows the structure of a cathode ray oscilloscope. What is component C and D?
Rajah menunjukkan struktur osiloskop sinar katod. Apakah komponen C dan D?
C: Cathode / Katod
D: Control Grid / Grid kawalan
C: Control Grid / Grid kawalan
D: Focusing anode / Anod memfokus
C: Accelerating anode / Anod memecut
D: Focusing anode / Anod memfokus
C: Focusing anode / Anod memfokus
D: Accelerating anode / Anod memecut
- 20. Multiple Choice
Diagram shows the trace on a CRO screen. The Y-gain and the time-base are set at 3 volt / division and 5 ms / division respectively. What is the peak voltage and the frequency of the alternating current supply that connected to the C.R.O?
Rajah menunjukkan surih di atas skrin OSK. Gandaan-Y dan dasar masa telah disetkan pada 3 volt / bahagian dan 5 ms / bahagian masing-masing. Apakah voltan puncak dan frekuensi arus ulang alik yang disambungkan ke OSK?
0.2 Hz
0.04 Hz
40 Hz
200 Hz
- 21. Multiple Choice
Diagram shows two magnets with opposite poles are placed at the sides of the tube causing the shadow being deflected. The direction of the deflection is determined using
Rajah menunjukkan dua batang magnet dengan kutub berlawanan diletakkan di sisi tiub tersebut menyebabkan bayang itu terpesong. Arah pesongan itu ditentukan dengan menggunakan
the right hand grip rule
petua genggaman tangan kanan
the left hand grip rule
petua genggaman tangan kiri
the Fleming's right hand rule
petua tangan kanan Fleming
the Fleming's left hand rule
petua tangan kiri Fleming
- 22. Multiple Choice
Diagram below shows an audio signal generator connected to a cathode ray oscilloscope, CRO.
Which signal shows the loudest and the highest pitched audio signal?
- 23. Multiple Choice
Diagram shows the structure of a cathode ray oscilloscope.
Which component, A, B, C, or D causes the electrons to accelerate?
A
B
C
D
- 24. Multiple Choice
Diagram 33 shows a trace on the screen of a cathode ray oscilloscope.
Which statement is correct to explain the trace produced?
Both Y-input and time base are switched off
Y-input is connected to battery and the time base is switched off
Y-input is connected to alternating current power supply and the time base is switched off
Y-input is connected to alternating current power supply and the time base is switched on
- 25. Multiple Choice
Diagram 25 shows the traces of a C.R.O. (Cathode Ray Oscilloscope) for an alternating current (a.c).
What is the peak voltage if the Y-gain is set at 5 V cm-1?
5 V
10 V
15 V
30 V
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