0
current does not flow through insulation under "normal circumstances". The air itself is often used as an insulator in HV and EHV electricity. When lightning strikes, it ionizes (lines up the molecules) in the air, causing a breakdown in the insulation strength of the air, which sometimes allows current to flow from one conductor to another in overhead power lines. This is called a "fault" and results in massive power flow until protective equipment interrupt the flow, and give enough time for the air do de-ionize before resuming normal operation.
What else can I help you with?
How does an ac curcuit work if current cant flow through a capacitor?
AC current can flow through a capacitor, it's DC current that can't
What happen when ac current passes through resistor?
it resists the flow of cuurent
Can a diode work in ac?
A diode is a "one-way valve" that allows electrical current to flow in only one direction. A diode placed in series between an AC voltage source and a resistive load will allow current to flow through the load in one direction and block the current when the polarity of the AC voltage changes.
Can current flow both ways through a lamp?
Yes, we use AC (alternating current) in our homes, the current changes direction 120 times a second.
What is a define current?
Current is the flow of electric charge through a conductor, measured in amperes (A). It is commonly symbolized by the letter 'I' in equations. Current can be either direct current (DC), where the flow is in one direction, or alternating current (AC), where the flow changes direction periodically.
What can change alternating current to direct current?
A rectifier is used to convert alternating current (AC) to direct current (DC). The rectifier allows current flow in one direction only, converting the back-and-forth flow of AC to a constant flow in DC circuits.
What is The flow of electrons through a circuit is called a?
The flow of electrons through a circuit is called an electric current. It is typically measured in amperes (amps) and can flow in two forms: direct current (DC), where electrons move in a single direction, and alternating current (AC), where the direction of electron flow periodically reverses. Electric current is essential for powering electrical devices and systems.
How can identify AC and DC?
DC is direct current, and is characterized by its steady flow of current. AC is alternating current. It is characterized by increases and decreases in the current.
Why does a wire begin to vibrate when ac is passed through it?
When AC (alternating current) is passed through a wire, the current flow changes direction periodically. This change in current flow causes the wire to experience an electromagnetic force that makes it move back and forth, creating vibrations. These vibrations are more pronounced at certain frequencies because of resonance effects.
What Happens When an AC of 5A and dc current of 5A flow simultaneously through a circuit?
it will be the polarized sum of the two quantity
What statement descibes the flow of electic current in an AC circuit?
The flow of electric current in an AC circuit is alternating, it flows one way then the other, with reference to ground.
What is the relationship between current and frequency in AC circuit?
Two words: skin effect. Now let's chat. Picture a wire with DC flowing through it. We are going to look at a cross section of the wire without interrupting current flow. Make sense? Picture it. When current flows in a wire in only one direction (DC), it uses all the available metal in the wire. Current flow in the middle of the wire will be about the same per unit of cross sectional area as current flow will be near the outside of the wire. Let's switch our DC for some AC. AC (alternating current) will flow in one direction for a while and then reverse direction to flow the other way for a while. Such is AC. And AC will cause current flow that uses all the available cross sectional area of the wire just as DC does, but only at low frequency. At higher and higher frequencies, current flow in the wire will shift away from the center and be more concentrated near the surface of the conductor. Near the skin of the conductor. AC of higher frequencies will promote current flow by skin effect, and that is the effect of frequency in AC current flow.
