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  4. Two homogeneous spheres A and B of masses m and 2m having radii 2 a and a respectively are placed in touch. The distance of centre of mass from first sphere is

Q. Two homogeneous spheres and of masses and having radii 2 and respectively are placed in touch. The distance of centre of mass from first sphere is

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Solution:

We assume that origin is situated at the




Questions from NTA Abhyas 2022

1. Which one of the following statements is wrong in the context of -rays generated from an -ray tube?

2. Light of two different frequencies whose photons have energies and respectively illuminate a metallic surface whose work function successively. The ratio of maximum speeds of emitted electrons will be

3. A thin semicircular conducting ring of the radius is falling with its plane vertical in a horizontal magnetic induction . At the position MNQ, the speed of the ring is and the potential difference developed across the ring is

4. A flat mirror is arranged parallel to the wall at a distance from it. The light produced by a point source kept on the wall is reflected by the mirror and produces a light spot on the wall. The mirror moves with velocity towards the wall.

5. A particle moves along axis as , here is a constant. Which of the following is true?

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