Some question asked earlier by students

  1. TWO IDENTICAL CONDUCTING SPHERES ‘A’ & ‘B’ CARRY EQUAL CHARGES. THEY ARE INITIALLY SEPARATED BY A DISTANCE MUCH  LARGER THAN THEIR DIAMETERS AND THE FORCE BETWEEN THEM IS ‘F’. A THIRD IDENTICAL CONDUCTING SPHERE ‘C’ IS UNCHARGED. SPHERE ‘C’ IS FIRST TOUCHED TO ‘A’ AND THEN TOUCHED TO ‘B’ AND THEN REMOVED. AS A RESULT, WHAT IS THE FORCE BETWEEN ‘A’ AND ‘B’ ?
  2. WHEN 20j OF WORK IS DONE ON A GAS,40j OF HEAT ENERGY IS RELEASED.IF THE INITIAL INTERNAL ENERGY OF THE GAS WAS 70j.WHAT IS THE FINAL INTRENAL ENERGY?
  3. the graph for total energy stored in capacitor versis capacitance comes out to be rectangular hyperbola:
    which of the two, charge on the capacitor or potential used to charge it is kept constant for this graph
  4. Wat does stereopsis mean?