Solar System — Set 6
Geography · सौर मंडल · Questions 51–60 of 70
What is the term for the scientific study of the origin and evolution of the universe?
Correct Answer: A. Cosmology
Cosmology is the scientific study of the origin, evolution, and eventual fate of the universe. It involves physics and astronomy. The Big Bang theory is a key part of modern cosmology.
A highly magnetized, rotating neutron star that emits beams of electromagnetic radiation is called a?
Correct Answer: A. Pulsar
A Pulsar is a highly magnetized, rotating neutron star. It emits beams of electromagnetic radiation out of its magnetic poles. These beams are observed as pulses of light.
The 'Chandrasekhar Limit' is related to?
Correct Answer: C. Stars (White Dwarfs)
The Chandrasekhar Limit is the maximum mass of a stable white dwarf star. It is approximately 1.4 times the mass of the Sun. Above this limit, the star collapses into a neutron star or black hole.
What is the orbital period of Halley's Comet?
Correct Answer: A. 76 years
Halley's Comet has an orbital period of approximately 76 years. It is the only known short-period comet that is clearly visible to the naked eye from Earth. It last appeared in 1986.
Which planet has a day longer than its year?
Correct Answer: C. Venus
Venus has a day (rotation period) that is longer than its year (orbital period). It takes 243 Earth days to rotate once but only 225 days to orbit the Sun. This is due to its extremely slow rotation.
Which moon of Jupiter is the most geologically active object in the solar system?
Correct Answer: A. Io
Io, a moon of Jupiter, is the most geologically active object in the solar system. It has hundreds of active volcanoes. This activity is caused by tidal heating from Jupiter's gravity.
The 'Foucault Pendulum' is used to demonstrate?
Correct Answer: B. Earth's rotation
The Foucault Pendulum provides a simple proof of the Earth's rotation. As the pendulum swings, its plane of oscillation appears to rotate. This effect is caused by the Earth turning underneath it.
What force is responsible for the deflection of winds to the right in the Northern Hemisphere?
Correct Answer: D. Coriolis Force
The Coriolis Force causes moving air and water to turn right in the Northern Hemisphere. This is a result of the Earth's rotation. It plays a key role in weather patterns.
When do 'Spring Tides' occur?
Correct Answer: A. During Full Moon and New Moon
Spring Tides occur during the Full Moon and New Moon phases. This happens when the Earth, Moon, and Sun are aligned (Syzygy). The combined gravitational pull creates higher high tides.
When the Moon is closest to the Earth in its orbit, it is called?
Correct Answer: A. Perigee
Perigee is the point in the Moon's orbit where it is closest to Earth. This can result in a 'Supermoon' if it coincides with a full moon. Apogee is when it is farthest away.