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HomePhysics5. A 5 metre long wire is fixed to the ceiling. A weight of 10 kg is hung at the lower end and is 1 metre above the floor. The wire was elongated by 1 mm. The energy stored in the wire due to stretching is

5. A 5 metre long wire is fixed to the ceiling. A weight of 10 kg is hung at the lower end and is 1 metre above the floor. The wire was elongated by 1 mm. The energy stored in the wire due to stretching is

(a)  Zero                                                 (b)   0.05 joule

(c)  100 joule                                        (d)     500 joule

Answer-b

(18)

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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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