A pulsar requires that a neutron star
I.rotate rapidly.
II.have a radius of at least 10 km.
III.have a strong magnetic field.
IV.rotate on an axis that is different from the axis of the magnetic field.

Question

A pulsar requires that a neutron star 
I.rotate rapidly.
II.have a radius of at least 10 km.
III.have a strong magnetic field.
IV.rotate on an axis that is different from the axis of the magnetic field.

Quizplus · Accepted Answer

A pulsar is a type of neutron star that emits beams of electromagnetic radiation, which are observed as pulses due to their rapid rotation. Therefore, the first statement is true. Neutron stars are very compact, typically with a radius of around 10 km, so statement II is not necessary for a pulsar. However, a strong magnetic field is required for the emissions to occur and interact with surrounding material, which is statement III. The rotation axis of a pulsar is not necessarily aligned with the magnetic axis, which creates a lighthouse effect that produces the pulsed emission. Therefore, statement IV is also true. Thus, the best choice is D) I, III, & IV.

A Pulsar Requires That a Neutron Star