1. Who undertook the first space walk and in which year?

2. The term used “to collect the information about an object and a place without physical contact” is called :

3. The velocity of electromagnetic wave is:

4. The audio frequencies range from:

5. The wavelength of a wave of frequency 10 kHz is:

6. The area served by an antenna of height 100 m is:

7. Which of the following is not transducer?

8. The space waves which are affected seriously by atmospheric conditions are:

9. An antenna is:

10. Broadcasting antenna are generally: