166: Four wires of same material and of dimensions as under as stretched by a load of same magnitude separately. Which one of them will be elongated maximum ?
(a) Wire of 1 m length and 2 mm diameter
(b) Wire of 2 m length and 2 mm diameter
(c) Wire of 3 m length and 1.5 mm diameter
(d) Wire of 1 m length and 1 mm diameter
167: Westerlies in southern hemisphere are stronger and persistent than in northern hemisphere. Why?
1. Southern hemisphere has less landmass as compared to northern hemisphere
2. Coriolis force is higher in southern hemisphere, as compared to northern hemisphere
Which of the statements given above isl are correct?
(a) 1 only
(b) 2 only
(c) Both 1 and 2
(d) Neither 1 nor 2
168: A rectangular piece of iron sheet measuring 50 cm by 100 cm is rolled into a cylinder of height 50 cm. If the cost of painting the cylinder is Rs. 50 per square metre, then what will be the cost of painting the outer surface of the cylinder ?
(a) Rs. 25.00
(b) Rs. 37.50
(c) Rs. 75.00
(d) Rs. 87.50
169: If water pollution continues at its present rate, it will eventually
(a) stop water cycle
(b) prevent precipitation
(c) make oxygen molecules unavailable to water plants
(d) make nitrate unavailable to water plants
170: With reference to the Indian history of art and culture, consider the following pairs: Famous work of Site Sculpture
1. A grand image : Ajanta of Buddha's Mahaparinirvana With numerous celestial musicians above and the sorrowful figures of his followers below
2. A huge image of : Mount Abu Varaha Avatar (boar Incarnation) of Vishnu, as he rescues Goddess Earth from the deep and chaotic waters sculpted on rock
3. "Arjuna's Penance"/ : Mamallapuram "Descent of Ganga" sculpted on the surface of huge boulders
Which of the pairs given above is/are correctly matched?
(a) 1 and 2 only
(b) 3 only
(c) 1 and 3 only
(d) 1, 2 and 3