Electric current passing through closed loop

In summary, the definition of an electric current passing through a closed loop requires stationary conditions, as the presence of capacitors and inductors can affect the current's behavior. This is because the current may depend on the time after the circuit is closed, and without knowing more details, it is not possible to determine the exact behavior of the current.
  • #1
Frank-95
52
1

Homework Statement



(sorry for possible notation errors, that might arise during the translation)

Why an electric current passing through a closed loop, can be defined only in stationary conditions?

Homework Equations



The Attempt at a Solution



I think that the reason is that, if the current is not stationary we must consider also displacement current and the tyme varying electric field, but the question is really generic so I have my doubts.

Can you help me? Many thanks!
 
Physics news on Phys.org
  • #2
In case of closed loop containing capacitors and/or inductors, the current depends on the time after closing the circuit, till the transient current is ceased. In case of resistors only in the circuit, the transient is for a very-very short time, and we can not determine it without knowing more details, as you wrote in your post.
 
  • Like
Likes Frank-95

1. What is an electric current?

An electric current is the flow of electric charge through a material. It is the movement of electrons in a specific direction, typically from an area of high potential to an area of low potential.

2. How does an electric current pass through a closed loop?

In order for electric current to pass through a closed loop, there must be a complete circuit. This means that the circuit must have a source of energy, such as a battery, and a closed path for the current to flow through, typically made of conductive materials such as wires. The current will flow from the positive terminal of the battery, through the circuit, and back to the negative terminal of the battery.

3. What is the difference between AC and DC current?

AC (alternating current) and DC (direct current) are two types of electric currents. The main difference between them is the direction in which the current flows. In AC, the direction of the current changes periodically, while in DC, the current flows in one direction. AC is typically used for power distribution, while DC is commonly used in electronic devices.

4. What factors affect the flow of electric current in a closed loop?

The flow of electric current in a closed loop is affected by several factors, including the voltage of the power source, the resistance of the materials in the circuit, and the type of circuit (series or parallel). The higher the voltage, the greater the flow of current. The higher the resistance, the lower the flow of current. In a series circuit, the current is the same throughout, while in a parallel circuit, the current is divided between branches.

5. How can electric current passing through a closed loop be measured?

Electric current can be measured using a device called an ammeter. This device is connected in series with the circuit and measures the flow of electrons through a specific point. The unit of measurement for current is amperes (A) or amps.

Similar threads

Induced current in a loop of wire when straight wire is cut
    • Introductory Physics Homework Help
Replies
3
Views
4K
I Question about the current through a strong insulator
    • Electromagnetism
Replies
2
Views
402
Solving Current & Power in 4 & 3 Wire Circuits
    • Introductory Physics Homework Help
Replies
9
Views
1K
Direction of induced current in the loop
    • Introductory Physics Homework Help
Replies
2
Views
2K
Displacement current and magnetic flux through a wire loop
    • Introductory Physics Homework Help
Replies
1
Views
1K
Navigate the Res-Monster Maze: Find R's Current
    • Introductory Physics Homework Help
Replies
6
Views
3K
E-field generated by constant current in a circular loop
    • Introductory Physics Homework Help
Replies
12
Views
2K
Why is the current through I2 constant?
    • Introductory Physics Homework Help
Replies
4
Views
1K
Understanding work in translation and rotation of a magnetic dipole
    • Introductory Physics Homework Help
Replies
1
Views
349
Torque on current carrying loop/Diploe moment of loop
    • Introductory Physics Homework Help
Replies
3
Views
1K

Hot Threads

Recent Insights

Back
Top