IBPS PO General Awareness: Physics questions with solutions

Q1. In the context of LiDAR, what does the letter "R" stand for?

1. Reflection
2. Ranging
3. Radiation
4. Resolution

Answer: Ranging

LiDAR stands for Light Detection and Ranging. The letter "R" refers to the process of measuring distance, i.e., ranging.

Q2. Why do longitudinal sound waves need molecules of a medium to travel?

1. Molecules of a medium are needed to be aligned synchronously for a sound wave to travel, thus essential.
2. Molecules of a medium are needed to be disturbed for a sound wave to travel, thus essential.
3. Because the emission or transmission of energy happens in the form of only light or space.
4. For sound waves to travel, the particles in the medium are needed to join together to create a greater mass.

Answer: Molecules of a medium are needed to be disturbed for a sound wave to travel, thus essential.

Sound travels as a disturbance passed from one particle of the medium to the next, creating compressions and rarefactions. Since this transfer requires particles, sound cannot travel through vacuum.

Q3. Read the passage and answer the question. What is sound?

1. Sound is any disturbance that can be perceived by the human ear
2. Sound is a vibration that is carried through various transmission mediums such as air or water
3. Sound is any kind of oscillation of wave in vacuum
4. Only (a) and (b)

Answer: Only (a) and (b)

Sound is a disturbance produced by vibrations and perceived by the human ear. It travels through a material medium such as air or water, not through vacuum, so statements (a) and (b) are correct.