2586: Which one of the following laser types is used in a laser printer ?
(a) Dye laser
(b) Gas laser
(c) Excimer laser
(d) Semiconductor laser
2587: Which of the following are matters on which a constitutional amendment is possible only with the ratification of the legislatures of not less than one-half of the States ?
I. Election of the President
II. Representation of States in Parliament
III. Any of the Lists in the 7th Schedule
IV. Abolition of the Legislative Council of a State
Choose the correct answer from the codes given below :
Codes :
(a) I, II and III
(b) I, II and IV
(c) I, III and IV
(d) II, III and IV
2588: Physiological population density is the ratio of:
(a) Total population to total area
(b) Total population to total irrigated land area
(c) Total population to urban land area
(d) Total population to rural land area
2589: Consider the following statements:
1. The axis of the earth's magnetic field is inclined at 23 1/2 degree to the geographic axis of the earth.
2. The earth's magnetic pole in the northern hemisphere is located on a peninsula in northern Canada.
3. Earth's magnetic equator passes through Thumba in South India.
Which of the following statements given above is/are correct?
(a) 2 only
(b) 3 only
(c) 2 and 3
(d) 1, 2 and 3
2590: Which of the following was the main reason of the downfall of Mauryan empire ?
(a) Weak successors of Ashoka who could not control the empire properly
(b) Religious policy of Ashoka
(c) Ashoka maintained friendly relations with his neighbours
(d) None of the above