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An electromagnet will maintain a charge as long as current continues to flow through it. Strengthening the charge is a matter of changing, or adjusting the components that enable the charge to flow. There are many ingredients that affect electromagnet strength. The length and width of the magnetic field, the amount of resistance the current encounters, the pulling power of the magnet itself, all determine how strong your electromagnet will be.
Charge=30C Current=10mA=0.0010 Charge=current*time. Time= charge/current =30/0.0010 =30000 TTT
Charge = (current) x (time)Time = charge/current = 15/0.005 = 3,000 seconds = 50 minutes .
don't know that's why i need help
yes, Easy of flow of current increases with increase of area of cross section.
If you know the electric current, the flow of electric charge through an object, traveling through a circuit and how long the current is applied, you can calculate electrical charge using the equation for current Q = It in which Q is the total charge measured in coulombs, I is current in amps, and t is time that the ..
An electromagnet will maintain a charge as long as current continues to flow through it. Strengthening the charge is a matter of changing, or adjusting the components that enable the charge to flow. There are many ingredients that affect electromagnet strength. The length and width of the magnetic field, the amount of resistance the current encounters, the pulling power of the magnet itself, all determine how strong your electromagnet will be.
Current will flow as long as there is a difference of potential (a voltage) and a path for current to flow. So no power-control device is required for current flow but yes it will flow with a power control decive.
Here we are given 3.1 amperes of current and are asked to find the time it takes 10 coulombs of charge to pass a given point. First ask yourself how many coulombs are passing a given point in one second. If we have 3.1 amperes of current, we have 3.1 coulombs of charge passing any given point in one second. If it takes 1 second for 3.1 coulombs of charge to pass, how long will it take for 10C of charge to pass?
An electric current is the flow of electric charge, carried by electrons in the conductor. Unless, it is a conducting solution, in which case the currents may be moving ions carried by water. Unless, it is the solar wind, in which case it is the stream of electrons and protons from the Sun carried by the vacuum of space and their own inertia. So, just to be on the safe side, electric current is the flow of charge and it does not matter what the charge is and it does not matter whether it is in a condcutor or interstellar space as long as it is moving.
One coulomb is defined as the amount of electrical charge transported, per second, at a current of one ampere. In terms of units, in SI a coulomb is special name given to an ampere second. The equation for this, is: Q = I t. Where Q = charge, I = current, and t = time.So, if we change the subject of the equation, for time, t, we have: t = Q/I = 10/5 = 2 s.
Charge=30C Current=10mA=0.0010 Charge=current*time. Time= charge/current =30/0.0010 =30000 TTT
Charge = (current) x (time)Time = charge/current = 15/0.005 = 3,000 seconds = 50 minutes .
curent= couloumb/ time 5=10c/t t =10c/5a t =2sec
As long as there is an applied voltage, current will flow.
As long as the electricity is static, it is of little concern. Of course, static today, current tomorrow. If you are in contact with a large static charge and also with the Earth, the energy can flow through you, and there might be enough to stop your heart. I heard of a man who picked up two cables to connect them and was cooked. The person in charge said it was static electricity, since the power was then not on. Of course, it is my point that static electricity is merely charge, and the charge (most usually) has to move to hurt you. Moving charges are called electric current.
The current relates to the flow of electric charge in an object. Basically the Ampere hour is a measure of how 'long' it will last for. So a higher amount will result in a longer lasting battery because it 'contains' more current.