A. increasing focal length of the lens
B. Decreasing focal length of the lens
C. Lens of large aperture
D. lens of short aperture
E. None of these
- The season changes because of the ____________?
- A. Moon is revolving round the earth B. Earth is revolving round its axis C. Earth is revolving round the sun D. Planet Mars is attracting the sun...
- Saturn’s largest moon is ?
- A. Dione B. Titan C. Ganymede D. Lapetus...
- Which of the following letter does not represent in periodic table?
- A. X B. K C. J D. N...
- Albert Einstein was a____________?
- A. Physicist B. Physician C. Chemist D. Biologist...
- Sound travels about ___________times faster in water than in air.
- A. 2 B. 3 C. 4 D. 5...