71. 72. 24 D) 0.02D A converging lens has a focal length of 25 cms. Its power in Diopters is 33 73. A) 4.0D B) 0.04D C) 2.0D Which of the following properties of solids is not dependant on the crystal structure? A) Isotropy C) Sharp melting point B) Anisotropy D)Symmetry The shortest wavelength observed in Paschen series of hydrogen spectra is A) 7800 B) 7349 C) 9546 D) 8201 74. 75. The output of the logic gate in figure is A GND A) 0 B) 1 C) A D) The magnitude of electric displacement or electric induction depends on- A) The applied field alone B) The dielectric polarization C) The applied field as well as dielectric polarization D) None of these.