MCQEasy1 mark
Select the correct option for each of the following questions
Which one of the following diagnostic methods use reflection of sound? (a) CT scan (b) Electrocardiogram (c) Echo cardiogram (d) MRI
Topic: Sound and vibrations
Previous-year question practice database
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Pick an option and check your answer. The full worked answer is below either way.
Answer
Exam answer
(c) Echo cardiogram.
Explanation
It uses reflected ultrasound.
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Equal volumes of water are added to three cylindrical jars A, B and C of same height and radii rA, rB and rC respectively with rB < rA < rC. If you blow air into the mouth of these jars, which tube will produce the shrillest note?
(a) A
(b) B
(c) C
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