Please select a subject first
Advertisements
Advertisements
The correct pattern of magnetic field lines of the field produced by a current carrying circular loop is:
Concept: Applications of Biot-Savart's Law > Magnetic Field at the Centre of a Circular Loop
Assertion (A): A current carrying straight conductor experiences a force when placed perpendicular to the direction of magnetic field.
Reason (R): The net charge on a current carrying conductor is always zero.
Concept: Force on a Current Carrying Conductor in a Magnetic Field
Give reason to justify the following: Flow of energy in a food chain is unidirectional.
Concept: Food Chain
"Our food grains such as wheat and rice, the vegetables and fruits and even meat are found to contain varying amounts of pesticide residues." State the reason to explain how and why it happens?
Concept: Food Chain
Explain how the pesticides enter a food chain and subsequently get into our body.
Concept: Food Chain
| Human body is made up of five important components, of which water is the main component. Food, as well as potable water, are essential for every human being. The food is obtained from plants through agriculture. Pesticides are being used extensively for a high yield in the fields. These pesticides are absorbed by the plants from the soil along with water and minerals and from the water bodies these pesticides are taken up by the aquatic animals and plants. As these chemicals are not biodegradables, they get accumulated progressively at each trophic level. The maximum concentration of these chemicals gets accumulated in our bodies and greatly affects the health of our mind and body. |
- Why is the maximum concentration of pesticides found in human beings? (1)
- Give one method which could be applied to reduce our intake of pesticides through food to some extent. (1)
- Various steps in a food chain represent: (1)
- Food web
- Trophic level
- Ecosystem
- Biomagnification
- With regard to various food chains operating in an ecosystem, man is a: (1)
- Consumer
- Producer
- Producer and consumer
- Producer and decomposer
Concept: Food Chain
Assertion (A): The energy which passes to the herbivores does not come back to autotrophs.
Reason (R): The flow of energy in a food chain is unidirectional.
Concept: Food Chain
Use of several pesticides which results in excessive accumulation of pesticides in rivers of ponds, is a matter of deep concern. Justify this statement.
Concept: Food Chain
Answer the following question.
Classify resources on the basis of origin.
Concept: Types - Natural and Human
How is the issue of sustainability important for development? Explain with examples.
Concept: Natural Resources
Answer the following question.
Explain the three factors that are crucial in deciding the outcome of the politics of social divisions.
Concept: Concept for Federal Division of Power in India Helped National Unity
How did nationalism emerge in Vietnam through the efforts of different sections of society to fight against the French? Analyse.
Concept: Nationalist Movement in Indo- China >> The Ideas of Phan Chu Trinh
"The Civil Disobedience Movement was different from the Non-Cooperation Movement." Support the statement with examples.
Concept: The Limits of Civil Disobedience
U.S. entry into the war in Vietnam marked a new phase that proved costly to Vietnamese as well as to the Americans." Analyse the statement.
Concept: Nationalist Movement in Indo- China >> The Ideas Phan Boi Chau, Ho Chi Minh
Three features A, B and C are marked on the given political outline map of India. Identify these features with the help of the following information and write their correct names on the lines marked in the map
A. The place where the Indian National Congress Session was held.
B. The place associated with peasant's satyagraha.
C. The city associated with the Jallianwala Bagh incident.
Concept: Introduction to Nationalism in India >> Impact of First World War, Khilafat, Non- Cooperation
How was the maritime silk route useful for Vietnam ?
Concept: Nationalist Movement in Indo- China >> America and the Vietnam War
Which among the following was the main reason for the weavers to revolt against contractors in Silesia, in 1845?
(A) Contractors reduced their payments drastically
(B) They stopped the supply of raw materials to them
(C) They refused to place orders for finished textiles
(D) Condition of weavers was very pitiable
Concept: Rise of Nationalism in Europe >> Growth of Nationalism in Europe After the 1830s.
Which among the following was the main reason to start the 'Tonkin Free School' in Vietnam?
(A) To provide 'Western Style Education'
(B) To provide 'Modern Education'
(C) To provide 'Science Education'
(D) To popularise the 'French Language'
Concept: Nationalist Movement in Indo- China >> America and the Vietnam War
How did the local people in the areas conquered by the Napoleon react to French rule? Explain.
Concept: Rise of Nationalism in Europe >> Characteristics of the Movements in Poland, Hungary,Italy, Germany and Greece
Describe any three suppressive measures taken by the British administration to clampdown on nationalists.
Concept: Introduction to Nationalism in India >> Impact of First World War, Khilafat, Non- Cooperation
