Share Facebook Email Telegram WhatsApp Results #1. A radio station broadcast at 30 metre band. The frequency of the carrier wave transmitted by this station is ____. 10 Hz 10 Hz 1000 Hz 1000 Hz 10 MHz 10 MHz 100 MHz 100 MHz #2. What measure the response of the ear to the sound? Amplitude Amplitude Intensity Intensity Frequency Frequency Loudness Loudness #3. In any medium as we increase the temperature the speed of sound ____. Increases Increases Decreases Decreases Remains same Remains same None of these None of these #4. Speed of sound in Aluminum is ____. Zero Zero 344 m/s 344 m/s 6420 m/s 6420 m/s None of these None of these #5. Name the medical instrument used for listening to sounds produced within the body,chiefly in the heart or lungs. SONAR SONAR Ultrasound Ultrasound Stethoscope Stethoscope None of these None of these #6. The audible range of sound for human beings extends from about ____. 2000 Hz to 20000 Hz 2000 Hz to 20000 Hz 200 Hz to 20000 Hz 200 Hz to 20000 Hz 20 Hz to 20000 Hz 20 Hz to 20000 Hz None of these None of these #7. Children under the age of five and some animals, such as dogs can hear up to _____. 15 kHz 15 kHz 20 kHz 20 kHz 25 kHz 25 kHz 30 kHz 30 kHz #8. As people grow older their ears become less sensitive to ____ frequencies. Lower Lower Higher Higher Infrasonic Infrasonic None of these None of these #9. Sounds of frequencies below 20 Hz are called ____. Audible range Audible range Infrasound Infrasound Ultrasound Ultrasound None of these None of these #10. The _____ produces and transmits ultrasonic waves. Detector Detector Transmitter Transmitter Receiver Receiver None of these None of these Finish
