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  1. At what height h above earth, the value of g becomes g/2 (where R=radius of earth)?
  2. A tuning fork of frequency 512 Hz makes 4 beats per second with the vibrating string
  3. In common base circuit of a transistor, current amplification factor is 0.95.
  4. Two point white dots are 1 mm apart on a black paper.
  5. Two equal and opposite charges of masses m₁ and m₂ are accelerated