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HomePhysicsThe gravitational potential energy of a body of mass ‘m’ at the earth’s surface  -mgRe  . Its gravitational potential energy at a height  Re from the earth’s surface will be (Here  is Re the radius of the earth)

The gravitational potential energy of a body of mass ‘m’ at the earth’s surface  -mgRe  . Its gravitational potential energy at a height  Re from the earth’s surface will be (Here  is Re the radius of the earth)

(a)    -2 mgR e                         (b) 2 mgR e

(c)     1/2 mgR e                       (d) -(1/2) mgR e

Answer:  d

(5)

5/5 - (1 vote)

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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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