Please select a subject first
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Answer the following question.
Show that the centripetal force on a particle undergoing uniform circular motion is -mrω2.
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Solve the following problem.
A car moves in a circle at a constant speed of 50 m/s and completes one revolution in 40 s. Determine the magnitude of the acceleration of the car.
Concept: undefined >> undefined
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Solve the following problem.
A particle moves in a circle with a constant speed of 15 m/s. The radius of the circle is 2 m. Determine the centripetal acceleration of the particle.
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Solve the following problem.
A projectile is thrown at an angle of 30° to the horizontal. What should be the range of initial velocity (u) so that its range will be between 40m and 50 m? Assume g = 10 m s-2.
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Answer the following question.
Explain spherical aberration for spherical mirrors. How can it be minimized? Can it be eliminated by some curved mirrors?
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Explain chromatic aberration for spherical lenses.
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Answer the following question in detail.
What is achromatism? Derive a condition to achieve achromatism for a lens combination. State the conditions for it to be converging.
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Answer the following question in detail.
Describe spherical aberration for spherical lenses. What are the different ways to minimize or eliminate it?
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Answer the following question in detail.
Derive the expressions for the magnifying power and the length of a compound microscope using two convex lenses.
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Refractive index of a flint glass varies from 1.60 to 1.66 for visible range. Radii of curvature of a thin convex lens are 10 cm and 15 cm. Calculate the chromatic aberration between extreme colours.
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The electric field in a region is given by `vec"E"` = 5 `hatk`N/C. Calculate the electric flux Through a square of side 10.0 cm in the following cases
- The square is along the XY plane
- The square is along XZ plane
- The normal to the square makes an angle of 45° with the Z axis.
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Choose the correct option.
The binding energy of a satellite revolving around the planet in a circular orbit is 3 × 109 J. It's kinetic energy is ______.
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Answer the following question.
Define the binding energy of a satellite.
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Answer the following question.
What do you mean by geostationary satellite?
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Answer the following question.
What is periodic time of a geostationary satellite?
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Answer the following question.
Why is a minimum two-stage rocket necessary for launching of a satellite?
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State the conditions for various possible orbits of satellite depending upon the horizontal/tangential speed of projection.
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Derive an expression for the critical velocity of a satellite.
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Answer the following question in detail.
State any four applications of a communication satellite.
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Draw a labelled diagram to show different trajectories of a satellite depending upon the tangential projection speed.
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