Assignmet Test 1

1. Which method of producing ultrasonic waves involves the use of a transistor circuit?

• Piezoelectric method     

• Magnetostriction method    

• Both

• None of the above

1. What property of ultrasonic waves enables their use in medical imaging?

• High frequency

• Long wavelength

• Low velocity

• Low amplitude

In architectural acoustics, how does an increase in the surface area of hard, reflective materials affect the reverberation time of a room?

• Decreases the reverberation time

• Increases the reverberation time

• No effect on the reverberation time 

• Decreases the absorption coefficient

1. What is one of the basic requirements for an acoustically good hall?

• High reverberation time

• Low absorption coefficient

• Limited factors affecting architectural acoustics

• None of the above

Which property of electromagnetic waves explains the phenomenon of light bending around obstacles?

• Interference 

• Diffraction

• Double refraction

• Polarization

Which type of electromagnetic waves are commonly used in radar systems?

• Microwaves

• Infrared rays

• Ultraviolet rays

• X-rays

In which application are X-rays primarily utilized?

• Medical imaging

• Wireless communication

• Food processing

• Infrared heating

Sabine’s formula is used to calculate the ________ of a room.

   ________ is the method of producing ultrasonic waves that involves the generation of stress within a material in a magnetic field.

________ is the property of electromagnetic waves that allows them to undergo constructive or destructive interference.