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Updated on 04th July, 2023 , 8 min read
The term "magnetic field" describes the region surrounding a magnet that produces magnetic energy as a result of the motion of electric charges. The letters "B" or "H" stand for the magnetic field.
Tesla is the SI unit for Magnetic Field. (T). The International System of Units' derived measure for magnetic field strength (also known as magnetic flux density) is the tesla (symbol - T). One Weber per square meter is equivalent to one tesla. The magnetic field unit is useful for measuring the magnetic force that surrounds any magnetically-active item.
Magnetic field strength is a measure of the force exerted by a magnetic field on a moving charge or another magnetic field. It is measured in units of tesla (T), named after the famous physicist Nikola Tesla.
One tesla is defined as the magnetic field strength generated by a current of one ampere flowing through a wire of one meter in length, placed perpendicular to the wire, at a distance of one meter from the wire. However, in practice, magnetic fields are often measured in smaller units such as millitesla (mT) or microtesla (µT).
B and H stand for the magnetic field, respectively.
The magnetic field is measured using the tesla SI measurement. (T). A magnetic field is defined as one tesla when a charge of one coulomb encounters a force of one newton while traveling at a speed of one m/s perpendicular to the magnetic field.
In terms of how it affects the environment, a magnetic field can be described in a number of different ways. There are B-fields and H-fields as a result.
The following table provides a list of common units used to measure magnetic field strength:
Unit | Abbreviation | Equivalent |
Tesla | T | 1 T = 10,000 G |
Gauss | G | 1 G = 0.0001 T |
Millitesla | mT | 1 mT = 0.001 T |
Microtesla | µT | 1 µT = 0.000001 T |
The conversion between these units is important, as some devices, such as MRI machines, use different units of measurement.
Magnetic field strength has many practical applications in our daily lives. For example, magnetic fields are used in MRI machines to produce detailed images of the body's internal organs and tissues. Magnetic field strength is also used in the design and manufacturing of electric motors and generators.
In addition, magnetic field strength is used in the design of safety standards for electronic devices. For example, the safe levels of magnetic field exposure for workers in various industries are regulated by government agencies, such as the Occupational Safety and Health Administration (OSHA).
According to Ampere's Law, a straight wire carrying a current produces a magnetic field that is directly proportional to the current and inversely proportional to the distance from the wire. The magnetic field lines form concentric circles around the wire, with the wire lying at the center of the circles.
The magnitude of the magnetic field (B) at a distance (r) from the wire is given by the equation:
B = (μ₀* I) / (2π * r)
where μ₀is the permeability of free space, I is the current flowing through the wire, and π is the mathematical constant pi (approximately equal to 3.14159).
The direction of the magnetic field can be determined using the right-hand rule. If the thumb of your right-hand points in the direction of the current flow, then the curled fingers of your hand will indicate the direction of the magnetic field lines around the wire.
When an electric current flows through a circular loop, a magnetic field is produced in the space surrounding the loop. The magnetic field is directly proportional to the current flowing through the loop and is strongest at the center of the loop.
The magnitude of the magnetic field (B) at the center of the loop is given by the equation:
B = (μ₀* I) / (2 * r)
where μ₀is the permeability of free space, I is the current flowing through the loop, and r is the radius of the loop.
The direction of the magnetic field can be determined using the right-hand rule. If you wrap your right hand around the loop so that your fingers curl in the direction of the current, then your thumb will point in the direction of the magnetic field lines.
The magnetic field produced by a circular loop has several practical applications. For example, it is used in the construction of electromagnets, which are used in a wide range of devices, including electric motors, generators, and MRI machines. The magnetic field produced by a circular loop can also induce an electric current in a nearby conductor, which is the basis of many electrical transformers.
A solenoid is a long, cylindrical coil of wire that is tightly wound to produce a magnetic field when an electric current flows through it. The magnetic field produced by a solenoid is like that produced by a bar magnet, with the field lines running from one end of the solenoid to the other.
The magnitude of the magnetic field (B) inside a solenoid is directly proportional to the current (I) flowing through the solenoid and the number of turns per unit length (N/L) of the wire making up the solenoid. The magnetic field is given by the equation:
B = μ°I N/L
where μ₀is the permeability of free space, N is the number of turns in the solenoid, L is the length of the solenoid, and I is the current flowing through the solenoid.
Answer:Tesla
Answer:2 × 10^-6 T
Answer: 4π × 10^-4 T
Answer: 1.2 N-m
Answer: 2π × 10^-3 T
Answer: 4 × 10^-4 T
Answer: 2 × 10^-5 T
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