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Can an electric field exist without a magnetic field?
Yes, an electric field can exist without a magnetic field. Electric fields are produced by electric charges, while magnetic fields are produced by moving electric charges. So, in situations where there are stationary charges or no current flow, only an electric field is present.
Where is the electric field in conducting and non-conducting sheets?
In a conducting sheet, the electric field is zero inside the material but can exist on the surface due to excess charge redistribution. In a non-conducting sheet, the electric field can exist both inside the material and on the surface, depending on the charge distribution.
Which is the best describes a parallel circuit?
A parallel circuit has more than one resistor (anything that uses electricity to do work) and gets its name from having multiple (parallel) paths to move along . Charges can move through any of several paths. If one of the items in the circuit is broken then no charge will move through that path, but other paths will continue to have charges flow through them. Parallel circuits are found in most household electrical wiring. This is done so that lights don't stop working just because you turned your TV off.Below is an animation of a parallel circuit where electrical energy is shown as gravitational potential energy (GPE). The greater the change in height, the more energy is used or the more work is done.The following rules apply to a parallel circuit:The potential drops of each branch equals the potential rise of the source.The total current is equal to the sum of the currents in the branches.The inverse of the total resistance of the circuit (also called effective resistance) is equal to the sum of the inverses of the individual resistances. One important thing to notice from this last equation is that the more branches you add to a parallel circuit (the more things you plug in) the lower the total resistance becomes. Remember that as the total resistance decreases, the total current increases. So, the more things you plug in, the more current has to flow through the wiring in the wall. That's why plugging too many things in to one electrical outlet can create a real fire hazard.
How can you turn off a magnetic field by a current?
If the magnetic field is caused only by a current, you can turn the current off.If you have another magnetic field, for example due to a permanent magnet, with a current you can create a magnetic field that counters the first one. But that will only work in certain regions in space; you can't cancel such a magnetic field everywhere in space.
What happens when a bar magnet is thrust into a coil?
When a bar magnet is thrust into a coil, the magnetic field of the magnet will "sweep" across the wire in the coil and induce a voltage in that coil. This is called induction, and if the coil is connected to an external circuit, there will be current flow in that circuit.
Why can't an electric current exist if the circuit is broken?
If the electric circuit is broken, there will be no medium for transfer of electrons and flow of current. Hence, electric current does not exist.
Why electric current cannot exist if an electric circuit is broken?
Current flow is fully based on motion of electrons since there is no possibilities to motion electron in open circuit there no current flow.
Why can't electric current exist if it is broken?
Simple - we just look at the meaning of electrical current. Electrical current is the movement of billions of tiny electrons moving along a conductor, like a wire, for instance. In order to move, these electron have to be 'pushed' by a force that we call EMF or just Volts. The electrons are also 'pulled' from the other side by Volts, as well. Electrical current will not move unless it is both pulled and pushed, which requires a complete, unbroken loop of some kind of conductor. If you break that loop, called a 'circuit', then no current can flow.
What are three important characteristics of electric circuit?
Voltage, frequency, current, impedance, and what the circuit is supposed to do are all important.
Why electric current current exist if an electric circuit is broken?
well, current is the movement of free electrons so if you break a point in the wire you effectively stop the electrons from flowing as the electrons need to be touching each other in order to pass on energy or charge. The reason why if there is a gap in the circuit the electrons dont just jump it is because of resistance of air as the electrons in air are not free to flow they are not conduction electrons unlike in a metal such as copper wire.
How does current exist?
Current is the flow of electric charge, typically carried by free electrons in a conductor. When a voltage is applied across a circuit, the electrons move in response to the electric field, creating an electric current. This flow of charge allows electrical energy to be transferred and utilized in various devices.
Give example of pictures in electric circuit?
There are no pictures in electric circuit, only symbols, so an example does not exist.
Can electric circuit without cell exist?
A: Have you bothered to look at the sky lately?
Even without current flow there can be voltage in a circuit?
Voltage is potential energy and can exist in a open circuit.
How can you develop a magnet?
Electric current in a coil can induce magnetism in an iron nail,place near the coil.when the electric current is cut off the magnetism in the iron nail disappears.the magnetism in the nail exist so long as there is electric current in the coil.this is an electromagnet.
Can current flow in a circuit without potential difference?
A current cannot exist without voltage but voltage can exist without current.Simple example is battery. A battery has votlage even though it is not connected elsewhere.
Can an electric field exist without a magnetic field?
Yes, an electric field can exist without a magnetic field. Electric fields are produced by electric charges, while magnetic fields are produced by moving electric charges. So, in situations where there are stationary charges or no current flow, only an electric field is present.
