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Give two examples of communication system which use space wave mode.
A TV tower is 80 m tall. Calculate the maximum distance upto which the signal transmitted from the tower can be received.
Concept: Sinusoidal Waves
By what percentage will the transmission ranges of TV tower be affected when the height of the tower is increased by 21%?
Concept: Bandwidth of Transmission Medium
Why are high frequency carrier waves used for transmission?
Concept: Bandwidth of Transmission Medium
What is meant by term ‘modulation’? Draw a block diagram of a simple modulator for obtaining an AM signal.
Concept: Amplitude Modulation (AM)
Why is frequency modulation preferred over amplitude modulation for transmission of music?
Concept: Amplitude Modulation (AM)
Write the function of receiver in communication system.
Concept: Basic Terminology Used in Electronic Communication Systems
Define amplitude modulation in a communication system.
Concept: Amplitude Modulation (AM)
Write the functions of the transducer and repeaters.
Concept: Basic Terminology Used in Electronic Communication Systems
What is the function of a bandpass filter used in a modulator for obtaining AM signal?
Concept: Basic Terminology Used in Electronic Communication Systems
Differentiate between amplitude modulated (AM) and frequency modulated (FM) waves by drawing suitable diagrams. Why is FM signal preferred over AM signal?
Concept: Detection of Amplitude Modulated Wave
Choose the correct answer from given options
The graph showing the correct variation of linear momentum (p) of a charge particle with its de-Broglie wavelength (λ) is _____________.
Concept: Energy and Momentum
Name any two foreign leaders, along with the countries they belonged to, who are recognized as the founders of the Non-aligned Movement.
Concept: Challenges to Bipolarity
‘Non-aligned Movement (NAM) has become irrelevant today'. Do you agree with the statement? Support your answer with any three suitable arguments.
Concept: Challenges to Bipolarity
| Column 'A' | Column 'B' | ||
| 1 | Head of the Commission of Enquiry | a | Chowdhary Charan Singh |
| 2 | Deputy Prime Minister of India from 1967 to 1969 | b | Jagjiwan Ram |
| 3 | Deputy Prime Minister of India from 1977 - 79 | c | J.C. Shah |
| 4 | Union Minister of India from 1952 - 1977 | d | Morarji Desai |
Concept: Emergence of Two Power Blocs After the Second World War
How did the Soviet Union suddenly disintegrate? Explain any six reasons.
Concept: Disintegration of the Soviet Union and Its Impact Or Consequences on the World Order
Why was the end of the Second World War considered to be the beginning of Cold War? Explain.
Concept: Emergence of Two Power Blocs After the Second World War
How was the U.S. benefited by the Soviet disintegration?
Concept: Disintegration of the Soviet Union and Its Impact Or Consequences on the World Order
Read the given passage carefully and answer the following questions:
Non-alignment as a strategy evolved in the Cold War context.... with the disintegration of USSR and the end of Cold War in 1991, non-alignment, both, as an international movement and as the core of India's foreign policy, lost some of its earlier relevance and effectiveness.
- Why did India adopt non-alignment?
- Explain any two reasons for the loss of its relevance by the Nan Aligned Movement
- How far do you agree that the Non-Aligned Movement has become an international movement?
Concept: Challenges to Bipolarity
If the Soviet Union had not disintegrated and the world had remained bipolar, how would that situation have affected the world politics?
Concept: Disintegration of the Soviet Union and Its Impact Or Consequences on the World Order
How are the threats faced by the people in the Third World different from those faced by the people living in the First World? Support your answer with examples.
Concept: Emergence of Two Power Blocs After the Second World War
