The Global Navigation Satellite System GLONASS is a Spacebasedsatellite navigation system operated by
Options:
(a) USA
(b) India
(c) Russian Federation
(d) France
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A SONAR (sound navigation and ranging) uses ultrasonic waves to detect and locate objects under water.
Let the distance between the ship and the enemy submarine be ‘S’. Speed of sound in water = 1450 m/s Time lag between transmission and reception of Sonar waves = 77 s In...
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If suddenly the gravitational force of attraction between Earth and a satellite revolving around it becomes zero, then the satellite will
(b) : The centripetal and centrifugal forces disappear, the satellite has the tangential velocity and it will move in a straight line Compare Lorentzian force on charges in the cyclotron.
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A person sitting in a chair in a satellite feels weightless because (a) the earth does not attract the objects in a satellite
Please put the reason behind the answer.
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A person sitting in a chair in a satellite feels weightless because (a) the earth does not attract the objects in a satellite
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A satellite is orbiting the earth close to its surface. A particle is to be projected from the satellite to just escape from the earth.
(d) will depend on direction of projection. EXPLANATION: Its minimum escape speed will be vₑ when projected vertically upward, but if projected otherwise the speed will be greater. So the escape speed will depend on...
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A battery-operated torch is adjusted to send an almost parallel beam of light.
The correct answer is (a) 40 lux
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A triode is operated in the linear region of its characteristics.
(c) remain almost the same
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A satellite is orbiting the earth close to its surface. A particle is to be projected from the satellite to just escape from the earth,
(d) will depend on direction of projection. EXPLANATION: Its minimum escape speed will be vₑ when projected vertically upward, but if projected otherwise the speed will be greater. So the escape speed...
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Name the electromagnetic waves, which (i) maintain the Earth’s warmth and (ii) are used in aircraft navigation.
(i) Infrared rays (ii) Microwaves.
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An electric kettle consumes 1KW of electric power when operated at 220V. A fuse wire of what rating must be used for it?
5 A rating must be used
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