Correct Answer: B. Pressure group

Explanation

A pressure group is defined as an organized group, which influences government decisions socially or economically, without necessarily entering into election activities for the control of the government.

Correct Answer: B. foreign policy

Correct Answer: B. C

Correct Answer: C. erect and bigger than the object

Explanation

Images formed by plane mirrors are virtual, upright, left-right reversed, the same distance from the mirror as the object's distance, and the same size as the object.

Correct Answer: C. at the end

Explanation

(a) Market in economics is defined as an arrangement by which buyers and sellers are brought into close contact for the purpose of transacting business. Such an arrangement is facilitated by telephone, telegraph system, postal communication, a particular location, etc.

(b) Features of a monopoly are as follows:

(i) there is only one seller of a product.

(ii) entry is restricted. Barriers to entry are so severe that new firms find it difficult to enter the market.

(iii) it has the power to control price or output but not both.

(iv) there is an imperfect knowledge or information about market conditions.

(v) there is no perfect substitute for the products sold by the monopolist.

(C) Sources of monopoly power:

(i) natural monopoly: Control over certain natural resources can give rise to a monopoly.

(ii) government monopoly: This occurs when a government sets up a corporation to provide certain services and such firms are protected from competition.

(iii) legal monopoly: monopoly can be created by law. Examples: Patent right and copyright which protect inventors and artists respectively.

(iv) merger of firms.

(v) technological monopoly.

(vi) huge capital required to set up the business.

(vii) limited market.

(viii) cartel e.g. OPEC.

(ix) takeovers.

Correct Answer: B. 56.3°

Explanation

\(a . b = |a||b|\cos \theta\)

\((5i + 12j).(2i + 3j) = -10 + 36 = 26\)

\(26 = |5i + 12j||-2i + 3j|\cos \theta\)

\(|5i + 12j| = \sqrt{5^{2} + 12^{2}} = \sqrt{25 + 144} = 13\)

\(|2i + 3j| = \sqrt{2^{2} + 3^{2}} = \sqrt{4 + 9} = \sqrt{13}\)

\(26 = 13(\sqrt{13})\cos \theta\)

\(\cos \theta = \frac{26}{13\sqrt{13}} = 0.5547\)

\(\theta = 56.3°\)

Correct Answer: C. -4 \(\frac{7}{12}\)

Explanation

1\(\frac{3}{4} - (2 \frac{1}{3} + 4)\) = \(\frac{7}{4} - (\frac{7}{3} + \frac{4}{1})\); \(\frac{7 + 12}{3}\)

\(\frac{7}{4} - \frac{19}{3} = \frac{21 + 76}{12}\)

= \(\frac{-55}{12} = -4 \frac{7}{12}\)

Correct Answer: (d) 9801

Correct Answer: B. Middle-Top-Bottom