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HomePhysicsTwo planets have the same average density but their radii are  R1  and  R2 . If acceleration due to gravity on these planets be g1  and g2 respectively, then

Two planets have the same average density but their radii are  R1  and  R2 . If acceleration due to gravity on these planets be g1  and g2 respectively, then

(a)      g1/g2 =  R1/R2                                   (b)  g1/g2 =  R2/R1

(c)      g1/g2 = R12/R22                               (d)    g1/g2 = R1 3/R2 3

Answer:  a

(29)

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12. An ideal gas is taken through the cycle A→ B → C → A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C → A is

(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (126)

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