What describes a alternating current?
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What describes a alternating current?
alternating current, abbreviation AC, flow of electric charge that periodically reverses. It starts, say, from zero, grows to a maximum, decreases to zero, reverses, reaches a maximum in the opposite direction, returns again to the original value, and repeats this cycle indefinitely.
How does electricity flow at an atomic level?
Electrons are held in their shells by an electrical force. The protons and electrons of an atom are attracted to each other. They both carry an electrical charge. The positive charge of the protons is equal to the negative charge of the electrons.
What is an atomic level?
n the concept of an atom as a central positively charged nucleus consisting of protons and neutrons surrounded by a number of electrons. The number of electrons is equal to the number of protons: the whole entity is thus electrically neutral. atomic theory.
How is AC current created?
Electric current is generated when a rotating loop of wire, known as an armature, is placed in a uniform magnetic field, or when a stationary armature is placed in a rotating magnetic field. In other words, each half of the armature periodically changes direction as the armature rotates.
Is dog a conductor?
A “DOG” conductor is a ACSR (aluminum conductor steel reinforced) cable with nominal aluminum cross-sectional area of 100 mm²….acsr dog conductor specification.
| Code name | acsr dog conductor | |
|---|---|---|
| Sectional area of aluminum | mm 2 | 105 |
| Total sectional area | mm 2 | 118.5 |
| Overall diameter | mm | 14.15 |
| Total | kg/km | 394 |
What is an atomic or molecular level?
Atomic, Molecular and Optical physics frequently considers atoms and molecules in isolation. Atomic models will consist of a single nucleus that may be surrounded by one or more bound electrons, whilst molecular models are typically concerned with molecular hydrogen and its molecular hydrogen ion.
What is molecular level?
When a scientist studies things on a molecular level, she’s looking at them up close, examining their cells. The adjective molecular comes up most often in biology and chemistry, and it always describes the very smallest units that make up organisms or elements.
What is alternating current?
Alternating current can be defined as a current that changes its magnitude and polarity at regular interval of time. It can also be defined as an electrical current which repeatedly changes or reverses its direction opposite to that of Direct Current or DC which always flows in a single direction as shown below.
How does an alternating current change the direction of charge flow?
An alternating current will flip the direction of charge flow (60 times a second in North America (60 Hz) and 50 times a second in Europe (50 Hz)). This is usually caused by a sinusoidally varying current and voltage that reverses directions, creating a periodic back and forth motion for the current (see Figure 1).
What happens when voltage and current alternate on a wire?
As the wire spins and periodically enters a different magnetic polarity, the voltage and current alternate on the wire. This current can change direction periodically, and the voltage in an AC circuit also periodically reverses because the current changes direction.
What happens when AC current is in a negative cycle?
The particles then reverse their direction and reach the maximum in the opposite direction after which AC again returns to the original value completing a negative cycle. The same cycle is repeated again and again. Alternating currents are also accompanied usually by alternating voltages.