Question Details

A state electricity report serves as an important tool to assess energy production and track progress in the power sector. By providing quarterly data on generation measured in gigawatt hours (GWh), the report highlights the contribution of different energy sources such as coal, gas, hydro, solar, and wind. This not only helps in understanding the overall energy mix and dependence on conventional versus renewable sources but also enables policymakers, planners, and stakeholders to evaluate trends, address gaps, and promote sustainable energy development. A state electricity report provides quarterly generation (in GWh) by source – Coal, Gas, Hydro, Solar, and Wind.


In Q1 Generation from Coal is 2,200 GWh, Gas contributes 800 GWh, Hydro 900 GWh, Solar 700 GWh, and Wind 400 GWh, for a total of 5,000 GWh.


In Q2 Coal rises to 2,400 GWh, while Gas dips to 700 GWh; Hydro improves to 1,000 GWh, Solar to 800 GWh, and Wind to 600 GWh, bringing the quarterly total to 5,500 GWh.


In Q3 Coal moderates to 2,100 GWh, Gas increases to 900 GWh, Hydro softens to 800 GWh, but Solar advances to 1,000 GWh and Wind to 700 GWh, keeping the total at 5,500 GWh.


In Q4 Coal moves to 2,300 GWh, Gas to 850 GWh, Hydro to 1,100 GWh, Solar to 900 GWh, and Wind to 850 GWh, for a total of 6,000 GWh.


For analysis, Renewables are taken as Hydro + Solar + Wind. A carbon policy scenario proposes cutting Q4 Coal by 10%, shifting the entire reduction equally into Solar and Wind. (255 words)


The overall renewable share (as % of annual generation) is closest to:

Options

A

42.5%

B

43.8%

C

44.3%

D

45.0%

Show Answer

Correct Answer :

Option C

44.3%

Solution :

The correct option is 44.3%.


To find the overall renewable share as a percentage of the total annual generation, we first calculate the total generation from renewable energy sources (Hydro, Solar, and Wind) and the total generation across all four quarters (Q1 to Q4).


Step 1: Calculate the total generation for each quarter and the annual total

The quarterly totals are given as follows:

Q1 Total = 5,000 GWh

Q2 Total = 5,500 GWh

Q3 Total = 5,500 GWh

Q4 Total = 6,000 GWh


Total Annual Generation:

Total Annual Generation=5000+5500+5500+6000=22,000 GWh


Step 2: Calculate the renewable generation for each quarter

Renewables are defined as Hydro + Solar + Wind.


Q1 Renewables:

Hydro+Solar+Wind=900+700+400=2,000 GWh


Q2 Renewables:

Hydro+Solar+Wind=1000+800+600=2,400 GWh


Q3 Renewables:

Hydro+Solar+Wind=800+1000+700=2,500 GWh


Q4 Renewables:

Hydro+Solar+Wind=1100+900+850=2,850 GWh


Step 3: Calculate total annual renewable generation

Total Renewable Generation=2000+2400+2500+2850=9,750 GWh


Step 4: Calculate the overall renewable percentage

Renewable Share (%)=975022000×100


Renewable Share (%)=44.318%≈44.3%


Thus, the overall renewable share as a percentage of total annual generation is closest to 44.3%.

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