The properties of ultrasound that make it useful, are :

(a) high power and high speed

(b) high power and good directivity

(c) high frequency and high speed

(d) high frequency and bending around the objects.

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Solution

The high power and good directivity of ultrasound make it useful. Hence, the correct choice is (b).

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Similar questions

The ultrasound waves can penetrate into matter to a large extent because they have :

(a) very high speed (b) very high frequency (c) very high quality (d) very high amplitude.

For a transistor amplifier, the voltage gain

(a) remains constant for all frequencies.

(b) is high at high and low frequencies and constant in the middle frequency range.

(d) None of the above.

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