1. Which of the following is the correct application of radio waves?
A. Camera auto focusing
C. diagnosis of bone fractures
B. Radio broadcasting
D. sterilization of medical instrument
2. Which band of frequency is suitable for communication over great distances?
A Low frequency
C. very low frequency
B. Medium frequency
D. extremely low frequency
3. All of these are uses of microwaves except
A. Radar
B. Cooking Food C. Using Remotes D. Using Cell phones
4. What vibrates inside the food to make friction?
A. air
B. electrons
C. sugar
D. water
5. Which of the following is considered as the application of infrared waves?
A. Camera auto focusing
C. radio broadcasting
B. Diagnosis of bone fracture
D. sterilization of medical instruments
6. How does UV light exhibit its germicidal effect?
A kills bacteria and viruses
C. disrupts the reproductive abilities of bacteria & viruses
B. heats up the bacteria and viruses D. interferes with the respiratory processes of bacteria and
viruses​