Question : ________ are used for communication in artificial satellites.

Option 1: Infrared waves

Option 2: Radio waves

Option 3: Ultraviolet (UV) rays

Option 4: Amplitude Modulation (AM) waves

Question : The device in a communication satellite which receives signals from an earth station and transmits them in different directions is______.

Option 1: transformer

Option 2: transistor

Option 3: transponder

Option 4: transducer

Question : How many natural satellites does the planet Venus have?

Option 1: 1

Option 2: 2

Option 3: 3

Option 4: 0

Question : Select the option that can be used as a one-word substitute for the given group of words.
An act of exchanging information

Option 1: Collaboration

Option 2: Communication

Option 3: Touch

Option 4: Hold

Question : Which of the following factors are responsible for railways having not developed much in the northeastern parts of India?

1) Highly dissected topography
2) Dense forests
3) Low population density
4) Heavy rainfall and frequent flooding

Option 1: 1, 2 and 3

Option 2: Only 3 and 4

Option 3: Only 2 and 3

Option 4: 1, 2 and 4