A
Q. An antenna in a Geostationary satellite should have a minimum beam width of which among the following values to cover the entire earth?
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Q. A periscope works on the principle of
Q. If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used?
Q. Which among the given type of radiation does not originate within the nucleus?
Q. Which of the following, can neither be created nor be destroyed ?
Q. Who discovered that the earth moves round the sun?
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