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  1. Two metal wires of identical dimensions are connected in series. If σ₁ and σ₂ are
  2. The temperature coefficient of resistance of an alloy used for making resistor is
  3. In an astronomical telescope in normal adjustment a straight black line of length
  4. In Young’s double slit experiment, the slit seperation is 1 mm and the screen
  5. A nucleus disintegrates into two nuclear parts which have their velocities in the ratio