nuclear fusion

Nuclear fusion is the

• hydrogen nuclei

• converted into energy

• joining of two nuclei

• radiation

How many hydrogen are needed for the Proton-proton chain cycle ?

• 2

• 4

• 6

• 8

What is the primary source of energy in the Proton-proton chain cycle?

• Hydrogen

• Helium

• Lithium

• Beryllium

From this cycle, how many atom hydrogen are needed and what are atoms are used in this cycle ?

• 5, nitrogen, helium and oxygen

• 6, carbon, nitrogen and hydrogen

• 4, carbon, nitrogen and oxygen

• 6, carbon, nitrogen and oxygen

Minimum condition for productive fusion are

• high temperature

• ion density

• high energy

• confinement time

Which type of magnetic confinement devices utilizes twisted magnetic fields to confine plasma ?

• Stellarator

• Takomak

• Z-pinch

• Magnetic mirror

In hydrogen bomb, the fusion process is triggered by a nuclear fission reaction. What is differences between nuclear fusion and nuclear fission

• In fusion one atom is split apart, and in fission two atoms are combined together

• Fission and fusion are exact the same process. Fission is just a smaller scale version of fusion

• Fission can occur naturally but fusion has only ever been produced artificially

• In fusion two atoms are combined together and in fission one atom is split apart