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Standard XII

Physics

Newton's Law of Gravitation

The largest a...

Question

The largest and the shortest distance of the earth from the sun is $r_{1}$ and $r_{2}$ . Its distance from the sun when it is at perpendicular to the major axis of the orbit drawn from the sun:

(r_{1} + r_{2}) / 4

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(r_{1} + r_{2}) / (r_{1} - r_{2})

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2 r_{1} r_{2} / (r_{1} + r_{2})

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(r_{1} + r_{2}) / 3

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Solution

The correct option is B $2 r_{1} r_{2} / (r_{1} + r_{2})$
Using the ellipse property is :
$2 / R = 1 / r_{1} + 1 / r_{2}$
$R = 2 r_{1} r_{2} / (r_{1} + r_{2})$

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The largest and the shortest distance of the earth from the sun is r1 and r2. Its distance from the sun when it is at perpendicular to the major axis of the orbit drawn from the sun:

The correct option is B 2r1r2/(r1+r2)Using the ellipse property is :2/R=1/r1+1/r2R=2r1r2/(r1+r2)

The largest and the shortest distance of the earth from the sun is $r_{1}$ and $r_{2}$ . Its distance from the sun when it is at perpendicular to the major axis of the orbit drawn from the sun:

The correct option is B $2 r_{1} r_{2} / (r_{1} + r_{2})$
Using the ellipse property is :
$2 / R = 1 / r_{1} + 1 / r_{2}$
$R = 2 r_{1} r_{2} / (r_{1} + r_{2})$