What is the estimated diameter of neutron star?
a) 1- 2 kilometers
b) 10- 20 kilometers
c) 3- 5 kilometers
d) 100- 200 kilometers
Which of the following is highly magnetized rotating neutron star?
a) pulsar
b) double pulsar
c) X-ray pulsar
d) merger
The radiations from the pulsar neutron star can observed when a beam of emission is pointing toward…….
a) moon
b) earth
c) sun
d) mars
If the initial mass of the star is more than five times the mass of the solar mass, the red giant becomes a……….
a) white dwarf
b) neutron star
c) black hole
d) none of these
Explanation:A black hole is a region of space time where gravity is so strong that nothing – no particles or even electromagnetic radiation such as light can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform space time to form a black hole.
The massive
star goes through uncontrolled contraction because of the inward pull of its
own…………
a) mass
b) energy
c) gravity
d) all of these
The contraction of star continues until the star becomes so dense that ….cannot escapes from its gravity.
a) mass
b) energy
c) light
d) all
