Physics HHW crossword

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Across
  1. 4. Twinkling of stars
  2. 6. Hypothetical magnetic pole
  3. 7. Muscular diaphragm controls size of the pupil
  4. 8. V ∝ I
  5. 9. Concave lens
  6. 10. Magnetic field of straight current-carying conductor are ___ circles
Down
  1. 1. Defect from ciliary muscle weakening
  2. 2. Point of convergence of parallel rays
  3. 3. Centre of spherical reflecting surface
  4. 5. Resistances in series