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HomePhysics7. The resultant of two forces and is R. If the first force is doubled then the resultant is also doubled. The angle between the two forces is

7. The resultant of two forces and is R. If the first force is doubled then the resultant is also doubled. The angle between the two forces is

(a) 60  °                                    (b) 120°

(c)      70  °                            (d) 180°

Ans. b

(8)

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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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