Metals are good conductors of electricity because they have free electrons. These free electrons allow electrical charge to move easily through the metal, enabling efficient conductivity. This property is a key characteristic of metals and is the primary reason they ...
Tiwari Academy Discussion Latest Questions
The work done in moving a unit positive charge from one point to another in an electric circuit is measured by the potential difference between those points. This quantity represents the energy required to move the charge and is a ...
The charging of objects occurs as a result of the transfer of electrons. Electrons are negatively charged particles that can move from one object to another, leading to the build-up of static electricity. Protons and neutrons, which reside in the ...
The force between two electric charges is related to Coulomb’s law. This law describes how the electric force between two charged objects depends on the amount of charge on each object and the distance between them. Coulomb’s law is fundamental ...
A cylindrical lens is used to correct the defect of astigmatism. This lens has different curvatures in different meridians, allowing it to compensate for the uneven curvature of the cornea or lens of the eye, thereby improving vision for astigmatic ...
The fisherman should aim directly below where the fish is visible. This compensates for the refraction of light at the water’s surface, which makes the fish appear higher than its actual position. By aiming below, the spear’s path will align ...
Sodium vapor lamps are often used for street lighting because their light is monochromatic and does not disintegrate when passing through water drops. This makes them effective for visibility and reduces light pollution, enhancing safety and energy efficiency in urban ...
The reason why we see the sun only a few minutes before the actual sunrise is due to refraction of light. Refraction bends light as it passes through the Earth’s atmosphere, causing the Sun’s image to appear above the horizon ...
A watchmaker uses a magnifying lens to see the fine parts of a watch. This tool helps magnify small details, making it easier to inspect and work on intricate components such as gears, springs, and tiny screws with precision.
Hypermetropia means farsightedness. This vision condition causes distant objects to be seen more clearly than near objects. It occurs because the eye focuses light behind the retina instead of on it. Convex lenses are used to correct hypermetropia by converging ...