Q286. Consider the following statements: 1. A geo-stationary satellite is at an approximate height of 10,000 km. 2. FM transmission of music is of very good quality because the atmospheric or man made noises which are generally frequency variations can do little harm. Which of the statements given above is/are correct?

A layer in the Earth’s atmosphere called Ionosphere facilitates radio communication. Why? 1. The presence of ozone causes the reflection of radio waves to Earth

Satellites used for telecommunication relay are kept in a geostationary orbit. A satellite is said to be in such an orbit when: 1. The orbit is geosynchronous.

Consider the following statements : 1. A flute of smaller length produces waves of lower frequency. 2. Sound travels in rocks in the form of longitudinal elasti

Consider the following statements: 1. The Richter scale is a logarithmic scale and so an increase of 1 magnitude unit represents a factor of 10 times in amplitu

With reference to India’s satellite launch vehicles, consider the following statements: 1. PSLVs launch the satellite useful for Earth resources monitoring wher

Consider the following statements: 1. India launched its first full-fledged meteorological satellite (METSAT) in September, 2002 2. For the first time, the spac

With reference to the Earth’s atmosphere, which one of the following statements is correct?

Consider the following statements : Statement-I : The atmosphere is heated more by incoming solar radiation than by terrestrial radiation. Statement-II : Carbon

The jet aircraft fly very easily and smoothly in the lower stratosphere. What could be the appropriate explanation? 1. There are no clouds or water vapour in th

Which of the following types is used by computed tomography employed for visualisation of the internal structure of the human body?

What does the term Dolby B or Dolby C printed on tape- recorders and other sound systems refer to:

Consider the following statements: In a nuclear reactor, self-sustained chain reaction is possible, because: 1. more neutrons are released in each of

For reproducing sound, a CD (Compact Disc) audio player uses a:

Which one of the following does a TV remote control unit use to operate a TV set?

One astronomical unit is the average distance between:

"Membrane Bioreactors" are often discussed in the context of:

Which one of the following is synthesised in the human body that dilates blood vessels and increases blood flow?