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Question

The data of installed capacity of electricity produced by different sources of energy (solar, wind and coal) in two states (X) and (Y) alongwith their respective populations are given for the years 2011 and 2021 in the table given below. Based on the data, answer the following questions:

Statewise details of population and installed capacity of electricity

State XState Y
Year

Population

(mn)

Solar

(GW)

Wind

(GW)

Coal

(GW)

Population

(mn)

Solar

(GW)

Wind

(GW)

Coal

(GW)

20115020104060150850
20216028154268201055

Per capita availability of electricity was least in

The correct answer is State Y, year 2011

Analyzing Per Capita Electricity Availability

The question asks us to determine in which state and year the per capita availability of electricity was the least. Per capita availability is calculated by dividing the total installed electricity capacity by the population.

First, let's look at the data provided in the table:

State Year Population (mn) Installed Capacity (GW) Total Installed Capacity (GW)
Solar Wind Coal
State X 2011 50 2 0 10 $2 + 0 + 10 = 12$
2021 60 28 15 42 $28 + 15 + 42 = 85$
State Y 2011 60 1 5 8 $1 + 5 + 8 = 14$
2021 68 20 10 55 $20 + 10 + 55 = 85$

Now, we calculate the per capita availability of electricity for each state and year. The formula is:

$\text{Per Capita Availability} = \frac{\text{Total Installed Capacity (GW)}}{\text{Population (mn)}}$

Calculating Per Capita Electricity for Each Option

  • State X, year 2011: Total Installed Capacity = 12 GW Population = 50 mn Per Capita Availability = $\frac{12 \text{ GW}}{50 \text{ mn}} = 0.24 \text{ GW/mn}$
  • State Y, year 2011: Total Installed Capacity = 14 GW Population = 60 mn Per Capita Availability = $\frac{14 \text{ GW}}{60 \text{ mn}} \approx 0.2333 \text{ GW/mn}$
  • State X, year 2021: Total Installed Capacity = 85 GW Population = 60 mn Per Capita Availability = $\frac{85 \text{ GW}}{60 \text{ mn}} \approx 1.4167 \text{ GW/mn}$
  • State Y, year 2021: Total Installed Capacity = 85 GW Population = 68 mn Per Capita Availability = $\frac{85 \text{ GW}}{68 \text{ mn}} \approx 1.25 \text{ GW/mn}$

Comparing Per Capita Availability Results

Let's compare the calculated values:

  • State X, 2011: 0.24 GW/mn
  • State Y, 2011: 0.2333 GW/mn
  • State X, 2021: 1.4167 GW/mn
  • State Y, 2021: 1.25 GW/mn

Comparing these values, $0.2333 \text{ GW/mn}$ is the smallest value among the four. This value corresponds to State Y in the year 2011.

Conclusion

Based on the calculations, the per capita availability of electricity was least in State Y, year 2011.

Revision Table: Key Calculations

State Year Population (mn) Total Capacity (GW) Per Capita Availability (GW/mn)
State X 2011 50 12 0.24
State Y 2011 60 14 $\approx 0.2333$
State X 2021 60 85 $\approx 1.4167$
State Y 2021 68 85 $\approx 1.25$

Additional Information on Per Capita Electricity Capacity

Per capita installed electricity capacity is an important indicator of a region's ability to supply power to its population. It represents the amount of generating capacity available per person.

  • A higher per capita capacity generally suggests a greater potential to meet electricity demand.
  • Installed capacity is the maximum potential output, not necessarily the actual generation or consumption. Actual electricity consumption is measured in kilowatt-hours (kWh) or megawatt-hours (MWh) per person per year.
  • Analyzing trends over time, as shown in the data from 2011 to 2021, helps understand the growth in electricity infrastructure relative to population growth. In both states X and Y, the installed capacity increased significantly from 2011 to 2021, leading to a substantial rise in per capita availability, even with population growth.
  • Different energy sources like solar, wind, and coal contribute to the total capacity. The mix of sources can impact factors like reliability, cost, and environmental footprint.
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Important Questions from Tabulation

  1. The table shows District-wise data of a number of primary school teachers posted in schools of a city.

    Study the table and answer the question:

    District

    Male teachers

    Female teachers

    East

    1650

    2375

    North

    1075

    2651

    West

    1280

    1520

    South

    1170

    1085

    Central

    690

    859


    What is the difference between the total number of male teachers in the districts East, North, West taken together and the total number of female teachers in the districts East and South?
  2. Table shows income (in Rs. ) received by 4 employees of a company during the month of December 2020 and all their income sources.

    Source

    Amit

    Suresh

    Nitin

    Varun

    Salary

    35000

    38500

    29000

    42000

    Arrears

    6000

    6300

    5000

    7500

    Bonus

    1000

    1100

    1000

    1240

    Overtime

    1800

    1950

    1400

    1500


    What is the ratio of salary of Varun to his income other than salary?
  3. Study the table and answer the question:

    Income (Rs.)

    No. of persons

    Less than 200

    12

    Less than 250

    26

    Less than 300

    34

    Less than 350

    40

    Less than 400

    50


    What is the percentage of persons earning Rs. 250 or more?
  4. The following table shows the annual profit of a company (in Rs. lakh).

    2014-2015

    2015-2016

    2016-0217

    2017-2018

    2018-2019

    625

    690

    725

    775

    815

    The period which has the maximum percentage increase in profit over the previous year is:

  5. The table given below shows the number of persons participating in a survey from 6 different states.

    States Persons 
    S1100
    S2200 
    S3400 
    S4500 
    S5600 
    S6800

    What is the ratio of number of person participating in a survey from state S3 to the number of person participating in a survey from state S4?

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