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An electric current flowing through a wire gives rise to a magnetic field whose direction depends upon what of the current?

The direction of the magnetic field produced by an electric current flowing through a wire is dependent on the direction of the current. The right-hand rule can be used to determine the direction of the magnetic field relative to the direction of the current flow.


The polarity of an electromagnet is determined by what?

The polarity of an electromagnet is determined by the direction of the electric current flowing through the wire coil. Reversing the direction of the current will change the polarity of the electromagnet.


In order to reverse the direction of current in a motor what does the current conduct?

To reverse the direction of current in a motor, the current conducting wires must be switched. By changing the configuration of the wires, the flow of current through the motor's coils can be reversed, thereby changing the direction of rotation of the motor.


Which circuit element(s) are known as diodes and only allow current to flow through them in one direction?

Diodes are the circuit elements that only allow current to flow through them in one direction.


When current passes through a wire?

When current passes through a wire, it creates a magnetic field around the wire. The direction of the magnetic field is determined by the direction of the current flow. This principle is the basis for electromagnets and various applications in electrical devices.


What is magnetic field produced by a current flowing through a wire?

A current flowing through a wire produces a magnetic field around the wire. The direction of the magnetic field is determined by the right-hand rule, where if you point your thumb in the direction of the current, your fingers will curl in the direction of the magnetic field lines. The strength of the magnetic field is directly proportional to the current flowing through the wire.


How do you reverse the direction of a magnetic field?

You can reverse the direction of a magnetic field by changing the direction of the electric current flowing through a conductor. This is known as the right-hand rule - if you pass your right-hand thumb in the direction of the current flow, your fingers will curl in the direction of the magnetic field. By reversing the direction of the current, you can reverse the direction of the magnetic field.


Why current density is vector quantity?

Current is not scalar. Current is a vector quantity. For simplicity, in electric circuits, current is scalar because the direction is assumed to be one way or another, rather than three dimensional.


How do you use a compass to find the flow through a wire?

A compass can be used to find the flow of current through a wire by placing the compass near the wire. The needle of the compass will align with the magnetic field created by the current flowing through the wire, indicating the direction of the current flow. The needle will point in the direction from which the current is coming.


Why current density is a vector quantity when current is scalar quantity?

Current density is a vector quantity because it has both magnitude and direction. It represents the flow of electric charge per unit area in a specific direction, as opposed to current which is the total amount of charge flowing through a conductor. The direction of current density indicates the direction in which the charges are moving.


What is relationship exists between the magnetic force and current through conductor?

The magnetic force experienced by a current-carrying conductor is directly proportional to the magnitude of the current flowing through it. This relationship is described by the right-hand rule for magnetic fields, where the direction of the force on the conductor can be determined by pointing the thumb of your right hand in the direction of the current and the fingers in the direction of the magnetic field.


How can electro magnets be controlled?

Electromagnets can be controlled by adjusting the amount of electric current passing through the wire coil. Increasing the current strengthens the magnetic field, while decreasing the current weakens it. Additionally, the direction of the magnetic field can be controlled by changing the direction of the current flow through the coil.