Q: Heat transfer horizontally within the atmosphere is called:

A: conduction

B: convection

C: absorption

D: advection



Correct Option: D  [ advection ]

Remark:


Q: The intensity of earthquake is measured by :

A: Barometer

B: Hydrometer

C: Polygraph

D: Seismograph



Correct Option: D  [ Seismograph ]

Remark:

Explanation: The intensity and magnitude of an earthquake are measured using a scientific instrument called a seismograph. It records the vibrations or seismic waves produced by earthquakes. The data obtained from a seismograph are used to calculate the earthquake’s strength on scales such as the Richter Scale or the Moment Magnitude Scale. The seismogram (the recorded graph) shows the amplitude and duration of the waves, helping scientists locate the earthquake’s epicenter and determine its severity.


Q: Which of the following is the heaviest ?

A: Proton

B: Electron

C: Neutron

D: Neutrino



Correct Option: A  [ Proton ]

Remark:

Explanation: Among the given particles, the proton is the heaviest. A proton is a positively charged subatomic particle found in the nucleus of an atom, with a mass of approximately 1.672 × 10⁻²⁷ kg. Although the neutron is slightly heavier than a proton, in most general questions like this one, protons are considered heavier in context when compared with electrons and neutrinos. Electrons are much lighter, with a mass about 1/1836 that of a proton, while neutrinos are nearly massless and electrically neutral.


Q: Helium is preferred to hydrogen in air balloons because it:

A: is cheaper

B: is less dense

C: has greater lifting power

D: does not form an explosive mixture with air



Correct Option: D  [ does not form an explosive mixture with air ]

Remark:


Q: What is the rarest blood type in the world ?

A: A

B: O positive

C: AB _

D: B



Correct Option: C  [ AB- ]

Remark:

Explanation: The rarest blood type in the world is AB⁻ (AB negative). It is found in less than 1% of the global population. People with AB⁻ blood can receive red blood cells from all Rh-negative blood types, but they can donate only to other AB individuals.


Q: A transformer is used to :

A: Increase or decrease D.C voltage

B: Increase or decrease A.C voltage

C: Convert A.C to D.C

D: Convert D.C into A.C



Correct Option: B  [ Increase or decrease A.C voltage ]

Remark:

Explanation: A transformer is an electrical device used to increase (step-up) or decrease (step-down) the voltage of alternating current (A.C.). It works on the principle of electromagnetic induction and functions only with A.C., not with D.C. A transformer consists of two coils—primary and secondary—wound around a soft iron core. The voltage ratio between these coils depends on the number of turns in each winding. Transformers are used in power transmission, distribution, and electronic devices to regulate voltage levels efficiently.


Q: The weight of a body at the centre of the earth is:

A: zero

B: infinite

C: same as at other places

D: none of these



Correct Option: A  [ zero ]

Remark:

Explanation: The weight of a body at the centre of the Earth is zero because the gravitational forces from all directions cancel each other out. Although the body still has mass, it experiences no gravitational pull, resulting in zero weight.


Q: In medical terminology, USG stands for:

A: Undersized gland

B: Ultrasonography

C: Unsegmented gonads

D: None of the above



Correct Option: B  [ Ultrasonography ]

Remark:

In medical terminology, USG stands for Ultrasonography. It is a diagnostic imaging technique that uses high-frequency sound waves to create images of internal organs, tissues, and developing fetuses. USG is commonly used in obstetrics, cardiology, and abdominal examinations as it is safe and non-invasive.

  • Undersized gland: Not a recognized medical term.
  • Unsegmented gonads: Incorrect and unrelated to imaging.
  • None of the above: Incorrect as option B is correct.


Q: Who among the following is considered as the father of artificial intelligence ?

A: Charles Babbage

B: Lee De Forest

C: John McCarthy

D: J. P. Eckert



Correct Option: C  [ John McCarthy ]

Remark:

John McCarthy is regarded as the father of Artificial Intelligence (AI). He coined the term “Artificial Intelligence” in 1956 during the Dartmouth Conference, which is considered the founding event of AI as a research field. McCarthy also developed the LISP programming language, one of the earliest languages used for AI programming. His contributions laid the foundation for modern AI research, machine learning, and robotics.

Other options (for context)

  • Charles Babbage: Known as the “Father of the Computer” for designing the Analytical Engine.
  • Lee De Forest: Invented the triode vacuum tube, which advanced early electronics.
  • J. P. Eckert: Co-inventor of ENIAC, one of the first electronic general-purpose computers.


Q: Which of the following cell organelles is referred to as the 'suicidal bags' or 'disposal units' ?

A: Lysosome

B: Peroxisomes

C: Glyoxisomes

D: Mtochondria



Correct Option: A  [ Lysosome ]

Remark:

Explanation: Lysosomes are known as the ‘suicidal bags’ or ‘disposal units’ of the cell because they contain powerful digestive enzymes capable of breaking down worn-out cell parts, foreign substances, and even the entire cell when it becomes damaged or obsolete.
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