General Science Physics Questions and Answers – Set 1

Correct Answer: C. Graphite

Explanation: Graphite is a good conductor of electricity because it has free electrons that can move within its layered structure. Unlike materials like dry air, paper, and kerosene, which are insulators, graphite allows the flow of electric current.

Correct Answer: A. Storm

Explanation: An unexpected drop in barometric tension demonstrates that a low-pressure framework is drawing closer. This frequently flags blustery climate, as low-pressure regions are commonly connected areas of strength for with, downpour, or serious atmospheric conditions..

Correct Answer: A. Prevent the body’s heat from escaping

Explanation: Winter clothes, such as woolen or layered garments, trap the body’s heat by creating an insulating layer of air between the body and the clothes. This trapped air prevents the heat generated by the body from escaping, keeping us warm. They do not supply heat but act as barriers to prevent heat loss.

Correct Answer: D. Flint Glass

Explanation: Flint glass is used for making sunglasses because it has a high refractive index and can be combined with various materials to block harmful UV rays and reduce glare. Its optical properties make it suitable for lenses in sunglasses, ensuring better protection and visual clarity.

Correct Answer: B. Glass

Explanation: The speed of sound is fastest in solids, as particles in solids are closely packed, allowing sound waves to travel more quickly. Among the given options, glass, being a solid, has the fastest speed of sound. Sound travels slower in liquids like water and glycerine and is slowest in gases like air.

Correct Answer: A. Dispersion of Light

Explanation: At the point when light goes through a crystal, it parts into its constituent tones (Violet, Indigo, Blue, Green, Yellow, Orange, and Red) because of scattering. This happens on the grounds that each variety in the light range has an alternate frequency and refracts by an alternate sum. This peculiarity is known as the scattering of light.

Correct Answer: D. Intermolecular forces between molecules

Explanation: Surface pressure emerges because of durable powers (a kind of intermolecular power) between the particles of a fluid. At the surface, particles experience an unequal internal power since there are no particles above to adjust these powers. This makes a “strain” by all accounts, limiting the surface region of the fluid.

Correct Answer: C. Endoscopy

Explanation: Optical fibers are widely used in endoscopy, a medical procedure to examine the inside of the body. The fibers transmit light and images, allowing doctors to view internal organs and tissues through a minimally invasive process. Optical fibers are not used in CAT scans, X-rays, or ultrasound scans, which rely on different technologies like radiation and sound waves.

Correct Answer: C. Lower density than dry air

Explanation: In humid air, water vapor molecules replace some of the nitrogen and oxygen molecules, making the air less dense compared to dry air. Since sound travels faster in less dense media, the speed of sound is higher in humid air than in dry air.

Correct Answer: B. Nylon

Nylon is commonly used for making gear wheels due to its high strength, wear resistance, and low friction properties. It is ideal for applications where durability and smooth operation are required. Other materials like Bakelite, polyester, and polystyrene are used for different purposes but are not as suitable for making gear wheels.