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A current i ampere flows along an infinitely long straight thin walled tube, then the magnetic induction at any point inside the tube is_______

A current i ampere flows along an infinitely long straight thin-walled tube, then the magnetic induction at any point inside the tube is zero... View Article

The transformer is used to light 100 W –110 V lamps from 220 V mains. If the main current is 0.5 A, the efficiency of the transformer is a. 90% b. 95% c. 96% d. 99%

The correct answer is a. 90% P=VI... View Article

The flux linked with a coil at any instant ‘t’ is given by ϕ=10t²−50t+250. The induced emf at t=3s is

Given According to the given data ϕ=10t2−50t+250. t=3s Find out We have to determine the induced emf at the given... View Article

The potential difference V_A−V_Bbetween points, A and B for the circuit segment shown in the figure at the given instant is

Given As per the given diagram We get to know that the current in the circuit is I=3A Find out We have to determine the... View Article

A particle executes SHM with amplitude 0.4 m and time period 24 s. The distance travelled by the particle in 10 s is (initially particle is at its mean position)

Given: According to the given data Amplitude = 0.4 m Time period = 24 s. Find out We have to determine the distance... View Article

Assertion: Mass of a body decreases slightly when it is negatively charged. Reason: Charging is due to the transfer of electrons. (A) Both Assertion and Reason are correct and Reason is the correct explanation for Assertion (B) Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion (C) Assertion is correct but Reason is incorrect (D) Assertion is incorrect but Reason is correct

The correct answer is an option (D) Assertion is incorrect but the Reason is correct If a body has an excess of electrons, it is said to be... View Article

Determine the period of small oscillations of the block of mass m as shown in the figure (The springs are ideal and pulleys are massless?)

A point mass M is suspended from the end of a light inextensible string whose upper end is fixed to a rigid support. The mass is displaced from... View Article

What are Consumer Forums? What is their importance?

Answer: Consumer forums are voluntary organisations. Consumer forums will help consumers to file cases in consumer courts. Consumer forums are... View Article

Describe the Evolution of Consumer Movement in India.

Answer: Due to shortage of food, hoarding, black marketing, adulteration of edible oil and food, there was rampant exploitation of... View Article

What is an allegory? Give an example of allegory.

Answer: An allegory has a symbolic and literal meaning. When an abstract idea such as liberty, freedom, envy, greed is expressed through a... View Article

A river with an inflow of domestic sewage rich in organic waste may result in a) Death of fish due to lack of oxygen b) An increased production of fish due to biodegradable nutrients c) Increased population of aquatic food web organisms d) The river will dry up very soon due to the algal bloom.

Answer: The correct answer is option (a) - Death of fish due to lack of oxygen. The dissolved oxygen will be reduced when the sewage is... View Article

How would you describe Taj Mahal?

Answer: Taj Mahal is a massive mausoleum. It was built using White marbles. Taj Mahal is located in Agra, Uttar Pradesh. Taj Mahal is an... View Article

Describe the interior of the Earth.

Answer: The structure of the earth can be divided into 3 parts - crust, mantle, and core. Crust is the outermost layer of the earth. Mantle,... View Article

Describe the houses of Harappan Civilization.

Answer: Usually the houses built in the Harappan Civilization were one or two storeys high. Around the courtyard, the rooms were constructed.... View Article

In the Rigveda, the Dasas and Dasyus refers to ________ a) Non-Aryans b) Tribals c) Robbers d) Menials

Answer: The correct answer is option (a) : Non-Aryans. People who used to compose hymns described themselves as Aryas. These people... View Article

Explain briefly about India’s Geographical location.

Answer: India is located in the Northern Hemisphere. Latitudes and Longitudes will help in determining the exact location of a country. The... View Article

Explain the Mahalwari System

Related Links Land Revenue Systems Under the British Rule NCERT Notes: Permanent Settlement [Modern Indian History Notes... View Article

Which are the major rice and wheat producing areas in India?

Answer: The major rice producing states in India are Uttar Pradesh, West Bengal, Punjab, Bihar, Odisha, Andhra Pradesh, Telangana, Tamil Nadu,... View Article

Why are the Southern Slopes of Himalayan Regions covered with thick vegetation cover as compared to Northern Slopes of the same hills?

Answer: Areas having heavy rainfall will have thick and dense vegetation when compared to areas having lesser rainfall. The growth of... View Article

When was the Council of State Industrial Development and Investment Corporation of India (COSIDICI) established?

Answer: The Council of State Industrial Development and Investment Corporation of India (COSIDICI) was established in 1976. COSIDCI comprises... View Article

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