WorksheetsUnifying concepts
Total questions: 11
Worksheet time: 8mins
Radar relies on the reflection of:
Sound waves
Light waves
Electromagnetic waves
All of the above
Sonar relies on the reflection of:
Radio waves
Light waves
Heat waves
None of the above
What would be generally used to locate a sunken ship?
Ultrasound
Radar
Sonar
Laser
What is the full form of laser?
(a)
Which waves are used to cook food in a microwave?
Radio waves
Infrared rays
Ultraviolet rays
None of the above
Which of the following rely on the reflection of sound waves?
Sonar
Laser
Ultrasound
Lidar
Fiber optic cables are made of:
(a)
What is the full form of radar?
(a)
Which of the following are applications for lasers?
Detecting enemy planes
Checking organs
CD player
Cutting metal
Antennas rely on the wave nature of:
sound
heat
electricity
light
What is the disadvantage of using copper wires for telephone?
Slow speed
Interference of signals
Having copper in wires can cause electric shock
None of the above
