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22 Waves

1. A whale produces sound waves of frequency 5 Hz that are detected by a microphone and displayed on an oscilloscope. 2. An oscilloscope is used to display a sound wave. The time-base is set at 5 s/mm, indicating the frequency of the sound wave is 6.7 Hz. 3. An oscilloscope is connected to an alternating voltage. The trace produced indicates the amplitude is 3.5 cm and the period is 1 ms.

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Soma Chowdhury Rosy
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54 views29 pages

22 Waves

1. A whale produces sound waves of frequency 5 Hz that are detected by a microphone and displayed on an oscilloscope. 2. An oscilloscope is used to display a sound wave. The time-base is set at 5 s/mm, indicating the frequency of the sound wave is 6.7 Hz. 3. An oscilloscope is connected to an alternating voltage. The trace produced indicates the amplitude is 3.5 cm and the period is 1 ms.

Uploaded by

Soma Chowdhury Rosy
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Waves (AS Level 22)

Akhtar Mahmood (0333-4281759)


M.Sc.(Physics), MCS, MBA-IT, B.Ed.
Measurements using CRO MIS, DCE, D AS/400e(IBM), OCP(PITB)
akhtar@salt.org.pk

1. A whale produces sound waves of frequency 5 Hz. gain at 10 V per division.


The waves are detected by a microphone and
displayed on an oscilloscope.

What is the frequency of the signal?


A 2.0 × 10 8 Hz B 2.5 × 10 2 Hz
7
What is the time-base setting on the oscilloscope? C 5.0 × 10 Hz D 3.1 × 108 Hz
A 0.1 ms div 1 B 1 ms div 1 {Q.5/June 14/13}
C 10 ms div 1
D 100 ms div 1 A signal that repeats periodically is displayed on the
5.
{Q.4/June 15/11} screen of a cathode-ray oscilloscope.
2. A cathode-ray oscilloscope (c.r.o.) is used to display
the trace from a sound wave. The time-base is set at 5
s mm 1

The screen has 1 cm squares and the time base is set at


2.00 ms cm 1.
What is the frequency of this periodic signal?
What is the frequency of the sound wave? A 50 Hz B 100 Hz C 125 Hz D 200 Hz
A 6.7 Hz B 67 Hz {Q.4/Nov 13/11,12}
C 6.7 kHz D 67 kHz. 6. The Y-input terminals of a cathode-ray oscilloscope
{Q25/June 15/13} (c.r.o.) are connected to a supply of amplitude 5.0 V and
3. A cathode-ray oscilloscope (c.r.o.) is connected to an frequency 50 Hz. The time-base is set at 10 ms per
alternating voltage. The following trace is division and the Y-gain at 5.0 V per division.
produced on the screen. Which trace is obtained?

The oscilloscope time-base setting is 0.5 ms cm 1 and


the Y-plate sensitivity is 2 V cm 1.
Which statement about the alternating voltage is
correct?
A The amplitude is 3.5 cm. {Q6/June 13/11 & Q4/Nov 06}
B The frequency is 0.5 kHz. Answer Grid:
C The period is 1 ms. Q. No. 1 2 3 4 5 6
D The wavelength is 4 cm.
{Q3/June 14/12}
Answer C B C B D
D
The display on a cathode-ray oscilloscope shows the
4.
signal produced by an electronic circuit.
The time-base is set at 5.0 ns per division and the Y-

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