Exam Questions

Question 1

Explain how the process of nuclear fusion leads to the release of energy.
(2)

Answer 1

Lighter nuclei join to form heavier nuclei
Some of the mass is converted into energy

Question 2

Explain the advantage of the radioactive waste having a shorter half-life.
(2)

Answer 2

Activity decreases at a faster rate so risk of harm decreases

Question 3

Describe the process of nuclear fission inside a nuclear reactor. (4)

Answer 3

Neutron absorbed by uranium nucleus and splits in two releasing two or three neutrons and gamma rays.

Question 4

Explain the advantage of power cables running at a high potential difference

Answer 4

There’s a very high potential difference means no current therefore causing thermal energy to be transferred surroundings increasing efficiency

Question 5

Explain why go near a power cable will cause a fatal electric shock

Answer 5

The electric field strength is very high causing the air to become ionised therefore the person conducts charge