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  4. The binding energy per nucleon for 1 H2 and 2 He 4 are 1.1 M eV and 7.0 M eV respectively. The energy released when two 1 H 2 fuse to form 2 He 4 is

Q. The binding energy per nucleon for and are and respectively. The energy released when two fuse to form is

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1. A truck of mass Ton is moving with a speed of . Sand is poured at the rate of per minute. How much force is needed to keep it moving with the same speed?

2. A horizontal force is applied on a block of weight to hold against a vertical wall. The minimum value of force needed to hold the block if the coefficient of friction of the surface is

3. A bird is inside a wire cage hung from a spring balance. The spring balance reading is when the bird is flying and when it is at rest inside the cage. Which of the following is correct?

4. 6. An ideal heat engine gives out heat at to have a of efficiency. The temperature of the source is

5. In an auditorium absorption co‐efficient of an open window is

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4. A wheel with metallic spokes each long is rotated with a speed of in a plane perpendicular to a magnetic field of . The induced emf between the axle and rim of the wheel will be,

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