Question

A pulsar requires that a neutron star

a) I.rotate rapidly.
b) II.have a radius of at least 10 km.
c) III.have a strong magnetic field.
d) IV.rotate on an axis that is different from the axis of the magnetic field.

Answer 1

A pulsar requires that a neutron star rotate rapidly, have a strong magnetic field, and rotate on an axis different from the magnetic field.

Step-by-step explanation:

A pulsar requires that a neutron star:

1. Rotate rapidly: Neutron stars collapse to form pulsars, and their small size allows them to spin very quickly. As the collapse causes the star to shrink, the conservation of angular momentum dictates that the rotation speed increases.
2. Have a strong magnetic field: Pulsars emit pulses of radiation due to electromagnetic beams originating from the star's highly magnetic poles. These beams produce the observed pulses as they sweep across Earth's line of sight.
3. Rotate on an axis different from the axis of the magnetic field: The pulsars' rotating beam of radiation requires the magnetic poles and the rotation poles to be misaligned. This model of a pulsar explains the periodic emissions observed.