One type of energy which has not been controlled so far is:
  1. ocean thermal energy
  2. nuclear fusion energy
  3. geothermal energy
  4. nuclear fission energy


(b) nuclear fusion energy


Explanation

The energy produced in nuclear fusion is much more than that produced in nuclear fission and has not been controlled so far.

Nuclear fusion is the source of the Sun’s phenomenal energy production. 

It is defined as the combining of two lighter nuclei into a heavier one through a nuclear reaction. Light nuclei have to be heated to extremely high temperature, which results in the production of a relatively high amount of energy.

The Sun contains Hydrogen and Helium atoms, where hydrogen fuses in a heavy amount [620 billion Kg of Hydrogen nuclei (protons) into Helium nuclei] every second to produce 384.6 trillion Joules of energy per second and make the sun a nearly inexhaustible source of energy.

Updated on: 10-Oct-2022

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