DAILY MCQs for PRE: 9.02.2018

1.  Which of the following is/are correctly matched?
 Pass                  Location
1. Shipki La        Himachal        Pradesh

2. Nathu La        Sikkim

3. Dihang           Arunachal Pradesh

Select the correct code:
a) 1 and 2
b) 2 and 3
c) 1 and 3
d) All of the above

Answer 1 —

Solution (d)

All are correctly matched

2. Consider the following statements about DART Mission

1. It is part of the Asteroid Impact and Deflection Assessment (AIDA) mission concept
2. It is developed by European Space Agency
3. It will demonstrate the kinetic impactor technique — striking the asteroid to shift its
orbit

Select the correct statements

a) 1 and 2
b) 2 and 3
c) 1 and 3
d) All of the above

Answer 2 —

Solution (c)

3. Consider the following statements about Coronal Mass Ejections (CMEs)

1. They are huge explosions of charged particles extending beyond the sun’s corona

2. They are responsible for geomagnetic storms and enhanced aurora
3. Visible Emission Line Coronagraph (VELC) of ISRO’s Aditya – L1 will study the origin of
CMEs

Select the correct statements

a) 1 and 2
b) 2 and 3
c) 1 and 3
d) All of the above

Answer 3 —
Solution (d)

1. Coronal mass ejections (CMEs) are huge explosions of magnetic field and plasma from the
Sun’s corona.

2. When CMEs impact the Earth’s magnetosphere, they are responsible for
geomagnetic storms and enhanced aurora.

3. The fastest CMEs erupt from large sunspot active regions, powered by the strongest
magnetic field concentrations on the Sun.

4 .  We can estimate the  properties of
a CME using observations from an instrument known as a coronagraph.

5.  CMEs show up as bright
clouds of plasma moving outward through interplanetary space.

4. Consider the following statements

1. It is the region of space surrounding Earth where the magnetic field of interplanetary
space is dominant than the magnetic field of Earth

2. The magnetosphere is formed by the interaction of the solar wind with Earth’s
magnetic field

3. The pressure of the solar wind on Earth’s magnetic field compresses the field on the
dayside of Earth and stretches the field into a long tail on the nightside

Select the correct statements

a) 1 and 2
b) 2 and 3
c) 1 and 3
d) All of the above

Answer 4 —

 Solution (b)

1. The magnetosphere is the region of space surrounding Earth where the dominant magnetic
field is the magnetic field of Earth, rather than the magnetic field of interplanetary space.

2.
The magnetosphere is formed by the interaction of the solar wind with Earth’s magnetic
field.

3. Earth’s magnetic field is
quite complex, but still, to a great extent, can be viewed as a dipole, with north and south
poles like a simple bar magnet. Earth’s magnetic axis, the dipole, is inclined at about 11
degrees to Earth’s spin axis.

4.
The pressure of the solar wind on Earth’s magnetic field compresses the field on the dayside
of Earth and stretches the field into a long tail on the nightside.