Magnetic Effects of Electric Current

Magnetic field lines always form closed loops, starting at the north pole and ending at the south pole outside the magnet, and vice versa inside the magnet.

Magnetic field lines never cross each other. This indicates that the magnetic force at a given point acts in a single direction.

The closer the magnetic field lines are, the stronger the magnetic field. Conversely, the farther apart the lines are, the weaker the field.

Magnetic field lines around a straight, current-carrying conductor are concentric circles with the wire at the center.

The strength of the magnetic field around a current-carrying conductor increases if the current in the wire is increased.

The region around a magnet where its force can be detected.

The path a small compass needle takes when placed in a magnetic field.

A Danish scientist who accidentally discovered the relationship between electricity and magnetism.

An experiment conducted by Oersted that showed a compass needle deflecting near a current-carrying wire.

The ability of a compass needle to align with the magnetic field lines.

The relationship between electricity and magnetism.

A metal wire conducting electric current.

The movement of a compass needle when a current-carrying wire is placed nearby.

Magnetic field lines are straight and close to each other, indicating a strong magnetic field.

The magnetic field inside a solenoid weakens as you move towards its ends because the field lines spread out.

A current-carrying conductor creates a magnetic field around it. This field exerts a force on any magnet placed nearby.

Ampere's Law states that a magnet also exerts an equal and opposite force on a current-carrying conductor.

The direction of the force on a current-carrying conductor is determined by the directions of both the current and the magnetic field.

When a current-carrying conductor is perpendicular to a magnetic field, the force on the conductor is maximized.

The strength of the magnetic field is represented by the density of the field lines. Closer lines indicate a stronger field.

A solenoid is a coil of wire that acts as a magnet when current flows through it.

A phenomenon where a changing magnetic field creates an electric current in a conductor.

An instrument used to detect the flow of electric current in a circuit.

A rule used to determine the direction of induced current in a conductor moving in a magnetic field.

The direction of the induced current is determined by the direction of the magnetic field and the motion of the conductor.

The maximum induced current occurs when the magnetic field and the motion of the conductor are perpendicular to each other.

Electromagnetic induction is used to convert mechanical energy into electrical energy in devices like generators.

The force exerted on a current-carrying conductor in a magnetic field.

The energy possessed by an object due to its motion.

The direction of the magnetic field inside and outside the solenoid is given by the right-hand rule: If you curl your fingers in the direction of the current flow, your thumb points in the direction of the magnetic field inside the solenoid.

Fleming's left-hand rule is a tool used to find the direction of the force on a current-carrying conductor placed in a magnetic field. Hold your thumb, forefinger, and middle finger of your left hand at right angles to each other. If the forefinger points in the direction of the magnetic field, and the middle finger points in the direction of the current, then the thumb will point in the direction of the force on the conductor.

An electric motor works on the principle that a current-carrying conductor placed in a magnetic field experiences a force.

A armature is the rotating part of an electric motor. It contains a set of coils of insulated wire wound around a soft iron core. It's essential for converting electrical energy into mechanical energy.

A brush is a component that provides electrical contact between the stationary part of an electric motor, the commutator, and the external power source.

A split ring commutator is made of two half rings (R1 and R2) of metallic rings. The ends of the armature coil are connected to these halves. Brushes make contact with the split ring, which reverses the direction of current flowing through the armature coil every half cycle.

The magnetic field lines of a solenoid are similar to those of a bar magnet, they form closed loops. However, the length of the magnetic field lines of a solenoid can be changed by changing the number of turns in the coil, while the length of the magnetic field lines of a bar magnet cannot be changed.

The region around a magnet where a magnetic material experiences a force due to the magnet.

A compass needle, which acts like a small bar magnet, aligns itself with the magnetic field lines when placed near a magnet. The force exerted by the magnet on the needle causes it to deflect.

The strength of a magnetic field is represented by the density of the field lines. Closer lines indicate a stronger field.

A straight conductor carrying electric current produces magnetic field lines that are concentric circles around the wire.

A changing magnetic field induces an electric current in a conductor. This is the basis of electromagnetic induction.

Fleming's right-hand rule helps to determine the direction of the induced current in a conductor moving in a magnetic field.

A current-carrying conductor experiences a force when placed in a magnetic field. This force is due to the interaction between the magnetic field produced by the conductor and the external magnetic field.

The direction of the force on a current-carrying conductor in a magnetic field depends on the direction of both the current and the magnetic field.