1691: An air bubble in water will act like a
(a) convex mirror
(b) convex lens
(c) concave mirror
(d) concave lens
1692: What is the purpose of evolved Laser Interferometer Space Antenna (eLISA) project?
(a) To detect neutrinos
(b) To detect gravitational waves
(c) To detect the effectiveness of missile defence system
(d) To study the effect of solar flares on our communication systems
1693: Consider the following conditions of sick human body
1. Swollen lymph nodes
2. Sweating at night
3. Loss of memory
4. Loss of weight
Which of these are the symptoms of AIDS?
(a) 1 and 2
(b) 2, 3 and 4
(c) 1, 2 and 3
(d) 1, 2, 3 and 4
1694: What does the term Dolby B, or Dolby C printed on tape recorders and other sound system refer to?
(a) Frequency modulated system
(b) Amplitude modulated system
(c) Noise reduction circuit
(d) Both DC and AC power can be used.
1695: Flame of the forest is:
(a) A tree blossomed with flowers like flame in leafless season
(b) Fire developed in the forest due to strong wind
(c) A lady who worked for the development of the forests
(d) An insect which glows like a flame in the forest