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When does a capacitor becomes saturated?
When both sides of its plates are full of their respectively charged electrons. This happens very rapidly, depending on the size of the Cap., generally within microseconds.
Why a circuit is protected by a circuit breaker?
1. protection against fire hazard from a short-circuit. A short-circuit can be caused by a loose wire, faulty insulation, or faulty wiring. A short-circuit will cause the wires to heat up rapidly, presenting a fire hazard. 2. protection against circuit overloading. Too much current in a wire caused by overloading (plugging in too many high-power appliances, for example) can cause overheating, presenting a fire hazard. Most circuit breakers have a "slow-blow" mode that breaks the circuit if overload continues for too long. 3. on grounded appliances (which have the third prong on the plug), the ground is connected to all exposed conductive material on the appliance. In the event that a loose wire contacts the exposed metal, a short-circuit will occur, and the power will be cut. This protects against accidental electrocution. Circuit breakers do not protect against fire hazards from inferior gauge of wire, glow-faults, or arc-faults. Most do not protect against electrocution hazards from ground-faults (although some do).
Why parallel circuit connection is used in common wiring practice?
A parallel circuit is used in common wiring practice because it allows one item to go out and the rest will remain on. Say that you had an office building. If every light bulb in the place was connected in series(every light bulb connected to the next on one current path), if one were to burn out, the circuit would break and all the other bulbs would go out. By using a parallel circuit, one bulb can go out and the rest can stay lit. Another reason that this occurs is because of the resistance involved in a series circuit. By connecting everything in one path, resistance to current will grow rapidly, so and current supplied to the circuit would be wasted by the resistance. Connecting in parallel gives multiple pathways for current to travel between devices and power sources, so the resistance is much lower, and more of the energy goes to powering the device rather than overcoming resistance.
What measurement can vary with AC current by not DC current?
HZ. Hertz is the name given to the frequency of the alternating circuit. Direct current (DC) has no frequency since one wire is always positive and the other is always negative; but AC (Alternating Current) rapidly changes polarity, and does so at a rate that is defined by HZ.
Explain seam welding and percussion welding?
Seam welding- resistance welding process involving the use of (normally) copper or copper alloy rollers to simultaneously pass high current (10^4 amps and usually in pulses) and apply pressure to bond a lap seam between two pieces of sheet metal. Percussion Welding- arc welding process involving the use of a capacitor bank to bond on the order of milliseconds. A high current electric arc is developed between the items to be joined, and the items are rapidly accelerated together.
How does an electric discharge occur?
An electric discharge occurs when a high voltage potential difference causes electrons to rapidly move through a medium, creating a flow of electric current. This flow of electrons can create visible light, heat, and sound, often seen in phenomena such as lightning or electrical sparks.
What is a electric that rapidly changes directions?
An electric current that rapidly changes directions is known as an alternating current (AC). This type of current flows back and forth in a circuit, changing direction at a specific frequency, such as 60 Hz in many parts of the world. This is in contrast to direct current (DC), which flows in only one direction.
Why do the electrons jump in an electrostatic discharge?
Electrons jump in an electrostatic discharge because of a buildup of electric charge, creating a potential difference between two objects. When the potential difference becomes high enough, the electrons move rapidly to neutralize the charge imbalance, producing a visible discharge of electricity.
What is an example of an electric force that occurs in atoms?
Electrons are always responsible for electric discharges and one example is lightning. when one electron gets charged in an atom it starts moving rapidly and bursts out of its atom and jumps from one electron to another electrically charging each of the electrons and forms a chain and creates the ligtning which we see in a nanosecond.
What is an example of electric force that occurs in an atom?
Electrons are always responsible for electric discharges and one example is lightning. when one electron gets charged in an atom it starts moving rapidly and bursts out of its atom and jumps from one electron to another electrically charging each of the electrons and forms a chain and creates the ligtning which we see in a nanosecond.
Which of the following subatomic particles are rapidly moving in orbit?
electrons
What is the particle of an atom that moves rapidly in the cloudlike region around the nucleus?
These particles are the electrons, elementary particles with negative electrical charge.
Explain how an electric bell works?
When the bell is pressed the contact screw comes in contact with the iron strip and the circuit is complete . The current starts flowing through the coil. The electromagnet gets magnetised ant the soft iron armature gets attracted towards the electromagnet. The movement of the hammer causes the hammer to hit the gong. This movement beaks the circuit so that the current stops flowing and switches of the electromagnet. The spring pulls the armature back to it's original position , the circuit is remade and the process starts over again .This is how the bell rings.
Why there is no current established in a conductor in the absence of electric field although a large number of free electron are moving with high speed?
There can be a large number of free electrons moving at a high speed, with no net current, if the electrons are all moving at random. Random motions are a form a heat, rather than current. You only have a current when significant numbers of electrons are moving in the same direction.
Explain why an electric discharge occurs?
An electric discharge occurs when there is a build-up of electric charge in a medium that exceeds the medium's ability to insulate or contain the charge. This excess charge will rapidly move through the medium in the form of a visible discharge, such as lightning or a spark, to restore equilibrium.
Is the particle of an atom that moves rapidly in the cloudlike region around the nucleus?
electrons
If a large enough electric field is applied how does an electric conductor become an insulator?
If a very large electric field is applied on a conductor then a phenomenon of a dielectric breakdown takes place and it looses all its charge carriers to the nearest conductor. Hence becoming an insulator.
