1516: The known forces of natures can be divided into four classes, viz., gravity, electromagnetism, week nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?
(a) Gravity is the strongest of the four
(b) Electromagnetism act only on particles with an electric charge
(c) Weak nuclear force causes radioactivity
(d) Strong nuclear force holds protons and neutrons inside the nuclear of an atom.
1517: In India, rural incomes are generally lower than the urban incomes. Which of the following reasons account for this ?
I. A large number of farmers are illiterate and know little about scientific agriculture.
II. Prices of primary products are lower than those of manufactured products.
III. Investment in agriculture has been low when compared to investment in industry.
Select the correct answer by using the codes given below :
Codes :
(a) I, II and III
(b) I and II
(c) I and III
(d) II and III
1518: India has Parliamentary democracy system because:
(a) Members of the Lok Sabha are elected by the public
(b) Council of Ministers is responsible to the Legislature
(c) Of distribution of power between the Centre and the States
(d) Of a single constitutional framework
1519: According to the ancient Indian geographical concept, "Bharatvarsha" was a part of
(a) Pushkaradweepa
(b) Jambudweepa
(c) Kraunchadweepa
(d) Kushdweepa
1520: A person with AB blood group is sometimes called a universal recipient because of the
(a) lack of antigen in his blood
(b) lack of antibodies in his blood
(c) lack of both antigens and antibodies in his blood
(d) presence of antibodies in his blood