GCSE Physics Question Analysis Topic: Physics - Short Questions
Exam Questions:
1) What are permanent magnets? Give one example.
2) Which of the following waves can be polarized:
(i) Heat waves
(ii) Sound waves
Give reasons to support your answers.
Answers:
For GCSE Physics, you should know:
1) Permanent magnets are those magnets with high coercivity and retentivity. Even when handled forcefully or exposed to stray reverse magnetic fields, permanent magnets retain their magnetism.
A compass magnet is an example.
2) Sound waves cannot be polarized because they are longitudinal waves, however heat waves may since they are transverse waves.
While longitudinal waves only oscillate in the direction of their transmission, transverse waves can also oscillate perpendicular to the direction of their transmission. Thus, polarization of longitudinal waves is impossible.
Work hard for your GCSE Physics examination!
End of analysis. Great!
