The unit of resistance is the ohm (symbol: Ω). Resistance is a measure of how much a material or device opposes the flow of electric current. It quantifies the degree to which a conductor resists the passage of electrons. The ...
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The algebraic sum of the currents meeting at a point in a circuit is zero. According to Kirchhoff’s current law (KCL), which states that the total current entering a junction (or node) in a circuit is equal to the total ...
Alternating current (AC) is converted into direct current (DC) using a rectifier. A rectifier is an electrical device that converts AC, which periodically changes direction, into pulsating DC by allowing current to flow in only one direction. This process involves ...
Electric current does not flow between two charged objects connected to each other if they are at the same potential. In electrical terms, potential refers to the electric potential difference between two points, determining the direction and amount of current ...
The unit of electric current is the ampere. It is one of the seven base units in the International System of Units (SI) and measures the flow of electric charge through a conductor. One ampere is defined as the flow ...
Copper is mainly used for conducting electricity because its electrical resistance is low. This low resistance allows for efficient transmission of electrical current with minimal energy loss, making copper an ideal material for electrical wiring and components in various applications.
To stay safe during an uneven lightning strike while in a car, close the windows and remain inside. A car acts as a Faraday cage, distributing the electric charge around its exterior, protecting occupants from lightning. Do not open windows, ...
Photon is the basic unit/quantity of light. It is a discrete packet of electromagnetic energy that exhibits both particle-like and wave-like properties. Photons carry specific amounts of energy depending on their frequency, and they are fundamental to various phenomena in ...
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 ...
A swimming pool appears deeper than its actual depth due to refraction. When light travels from water to air, it bends away from the normal, making objects underwater appear higher and deeper than they actually are when viewed from above ...