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HomePhysics17. If a spring extends by x on loading, then the energy stored by the spring is (if T is tension in the spring and k is spring constant)

17. If a spring extends by x on loading, then the energy stored by the spring is (if T is tension in the spring and k is spring constant)

(a)    T2/2x                                        (b)  T2/2k

(c)     2x/T2                                       (d) 2T2/k

Answer-b

(20)

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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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