Selected MCQ

Current Question
Which planet has its axis tilted by about 98 degrees, leading to extreme seasons?
  • A. Uranus
  • B. Venus
  • C. Mercury
  • D. Neptune
Correct Answer: A
Explanation:
Uranus rotates almost on its side (~98° tilt), causing extreme seasonal changes.
Related Question 1
Which of the following is NOT a dwarf planet in our solar system?
  • A. Pluto
  • B. Eris
  • C. Haumea
  • D. Titan
Correct Answer: D
Explanation:
Titan is a large moon of Saturn, not classified as a dwarf planet.
Related Question 2
What is 'degrees of freedom' (DOF) in the context of robot manipulators?
  • A. The number of axes the end-effector can move along or rotate
  • B. Number of sensors onboard
  • C. Robot's weight in kgs
  • D. Battery capacity
Correct Answer: A
Explanation:
DOF refers to the number of independent movements (translations/rotations) possible.
Related Question 3
What method do astronomers use when they detect exoplanets by observing a star's light dimming at regular intervals?
  • A. Radial velocity method
  • B. Transit method
  • C. Direct imaging
  • D. Astrometry
Correct Answer: B
Explanation:
The transit method identifies exoplanets by periodic dips in a star's brightness as a planet crosses its face.
Related Question 4
Which planet in our solar system has an orbital period shorter than its rotational period (a day longer than its year)?
  • A. Mercury
  • B. Venus
  • C. Mars
  • D. Jupiter
Correct Answer: B
Explanation:
Venus rotates very slowly (a Venusian day is about 243 Earth days) compared to its 225-day orbit around the Sun.
Related Question 5
The exoplanet candidate discovered orbiting Alpha Centauri A is notable because its mass is similar to that of which planet in our Solar System?
  • A. Earth
  • B. Jupiter
  • C. Saturn
  • D. Uranus
Correct Answer: C
Explanation:
Observations suggest an Alpha Centauri A exoplanet with a mass similar to Saturn, likely a gas giant.