A permanent magnet can affect both magnets and electromagnets.
A permanent magnet has natural magnetic properties while a temporal magnet is created by artificial means. Permanent magnets do not lose their magnetic ability.
At first, the intensity of the pain stimuli is sent through the nerve fibres to the brain parts that are limked with the pain perception such as anterior cingulate cortex.
A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence in Passive/Active Voice.