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Solve the following problem.
Calculate the speed of a satellite in an orbit at a height of 1000 km from the Earth’s surface.
(ME = 5.98 × 1024 kg, R = 6.4 × 106 m)
Concept: undefined >> undefined
Solve the following problem.
Calculate the value of acceleration due to gravity on the surface of Mars if the radius of Mars = 3.4 × 103 km and its mass is 6.4 × 1023 kg.
Concept: undefined >> undefined
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A planet has mass 6.4 × 1024 kg and radius 3.4 × 106 m. Calculate the energy required to remove an object of mass 800 kg from the surface of the planet to infinity.
Concept: undefined >> undefined
Solve the following problem.
Calculate the value of the universal gravitational constant from the given data. Mass of the Earth = 6 × 1024 kg, Radius of the Earth = 6400 km, and the acceleration due to gravity on the surface = 9.8 m/s2.
Concept: undefined >> undefined
A body weighs 5.6 kg wt on the surface of the Earth. How much will be its weight on a planet whose mass is 7 times the mass of the Earth and radius twice that of the Earth’s radius?
Concept: undefined >> undefined
Solve the following problem.
What is the gravitational potential due to the Earth at a point which is at a height of 2RE above the surface of the Earth?
(Mass of the Earth is 6 × 1024 kg, radius of the Earth = 6400 km and G = 6.67 × 10–11 N m2 kg–2)
Concept: undefined >> undefined
Answer the following question in detail.
Define and describe the magnifying power of an optical instrument.
Concept: undefined >> undefined
Answer the following question in detail.
How does magnifying power differ from linear or lateral magnification?
Concept: undefined >> undefined
Answer the following question in detail.
Derive an expression for the magnifying power of a simple microscope. Obtain its minimum and maximum values in terms of its focal length.
Concept: undefined >> undefined
Answer the following question in detail.
What is a terrestrial telescope and an astronomical telescope?
Concept: undefined >> undefined
Answer the following question in detail.
Obtain the expressions for magnifying power and the length of an astronomical telescope under normal adjustments.
Concept: undefined >> undefined
Answer the following question in detail.
What is the limitation in increasing the magnifying powers of a simple microscope?
Concept: undefined >> undefined
Answer the following question in detail.
What is the limitation in increasing the magnifying powers of a compound microscope?
Concept: undefined >> undefined
Answer the following question in detail.
What is the limitation in increasing the magnifying powers of the astronomical telescope?
Concept: undefined >> undefined
Answer the following question.
What is the unit of dipole moment?
Concept: undefined >> undefined
Answer briefly.
What is the modulation?
Concept: undefined >> undefined
Answer briefly.
What is meant by amplitude modulation?
Concept: undefined >> undefined
Answer briefly.
What is demodulation?
Concept: undefined >> undefined
Answer briefly.
What type of modulation is required for television broadcast?
Concept: undefined >> undefined
Answer briefly.
Why does amplitude modulation give noisy reception?
Concept: undefined >> undefined
