Science (English Medium) कक्षा १२ - CBSE Question Bank Solutions

Obtain the expression for the energy stored in a capacitor connected across a dc battery.

Do free electrons travel to region of higher potential or lower potential?

Prove that, if an insulated, uncharged conductor is placed near a charged conductor and no other conductors are present, the uncharged body must be intermediate in potential between that of the charged body and that of infinity.

A parallel plate capacitor (A) of capacitance C is charged by a battery to voltage V. The battery is disconnected and an uncharged capacitor (B) of capacitance 2C is connected across A. Find the ratio of total electrostatic energy stored in A and B finally and that stored in A initially.

Explain the hegemony of the United States of America as structural power.

'Resistance is the only option available to overcome the hegemony". Justify the statement by comparing it to other antihegemony strategies.

Write the four forms of power which reflect the U. S. Hegemony.

The rivalry between USA & USSR during the post-second world war period is known as ____________.

Which of the following statements about the NIEO is false?

The fall of the ____________ symbolizes the end of the Cold War.

The high point of Cold War was ______

Why didn't war happen during the Cold War?

Assertion: The Cold War was neither war nor an armed military conflict nor a condition of peace. It was rather a state of uneasy peace.

Reason: The Cold War was not being fought by clever moves, propagandist activities, and diplomatic conflicts.

Assertion: International Organisations play a very important role in maintaining peace.

Reason: Countries have conflicts and differences with each other.

In which of the following matters does International Organisation help?

1. To establish better living conditions in democratic countries.
2. In matters of peace & war.
3. To prevent violations of human rights.
4. To resolve territorial disputes.

The re-organization of the states on the basis of language had a negative effect ______

Study the cartoon given below and answer the question that follows:

The message that this picture gives is ______ 

The South Asian Association for Regional Cooperation (SAARC) is a major regional initiative by the South Asian states to evolve cooperation through multilateral means. Which among the following statements is/are correct in this regard?

1. SAARC was comparatively successful in most of the arenas inspite of the political differences between the member countries.
2. External influence of non-regional players is a major bone of contention which prevents attainment of full potential of SAARC.

Consider the following statements about the formation of ASEAN and choose the correct one/s.

1. ASEAN was established in1967 by ten countries of the region through the Singapore declaration.
2. The primary objective of the association is to accelerate economic growth and through that ‘social progress and cultural development’.
3. A secondary objective was to promote regional peace and stability based on the rule of law and the principles of the United Nations Charter.

The disintegration of Soviet Union was one of the most important events that altered the global geopolitics after the second world war. Consider the following statements in this regard and choose the correct one/s.

1. A coup took place in 1991 that was encouraged by Communist Party hardliners.
2. Boris Yeltsin emerged as a national hero in opposing this coup.
3. In December 1991, under the leadership of Yeltsin, Russia, Ukraine and Belarus, three major republics of the USSR, declared that the Soviet Union was disbanded.