Physics - Study Mode
[#101] The time period of a pendulum when taken to the Moon would:
Correct Answer
(D) Increase
Explanation
Solution: When the pendulum is taken to the moon, the value of 'g' will decrease and hence time period will increase. As the pendulum takes more time to complete one vibration, it will lose time.
[#102] "God Particle" is
Correct Answer
(B) Higgs Boson
Explanation
Solution: "God Particle" is Higgs Boson.
[#103] The mass of a star is two times the mass of the Sun. How it will come to an end ?
Correct Answer
(A) Neutron Star
Explanation
Solution: The mass of a star which is two times the mass of the sun turns into a neutron star. A neutron star is a type of stellar remnant that can result from the gravitational collapse of a massive star during a Type II, Type Ib or Type Ic supernova event. Such stars are composed almost entirely of neutrons, which are subatomic particles without electrical charge and with slightly larger mass than protons. Neutron stars are very hot and are supported against further collapse by quantum degeneracy pressure due to the Pauli’s exclusion principle. This principle states that no two neutrons (or any other fermionic particles) can occupy the same place and quantum state simultaneously. A typical neutron star has a mass between about 1.4 and 3.2 solar masses ( Chandrasekhar Limit), with a corresponding radius of about 12 km if the Akmal– Pandharipande–Ravenhall equation of state (APR EOS) is used.
[#104] Which of the following celestial bodies contains abundant quantities of helium-3, a potential source of energy ?
Correct Answer
(B) Moon
Explanation
Solution: The Moon has been bombarded with large quantities of Helium-3 by the solar wind.
[#105] The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be:
Correct Answer
(A) 8 T
Explanation
Solution: The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be 8T.