The magnetic field at point P due to the element dl is found to be proportional to the current in the wire, and the length of dl and
is inversely proportional to the square of the distance R
. The magnitude of this field is given by, ⇒|d→B|=μo4πIdlsinθR2.
What is the relationship between magnetic force magnetic fields and currents?
When an electrical wire is exposed to a magnet, the
current in that wire will be affected
by a magnetic field. The effect comes in the form of a force. The expression for magnetic force on current can be found by summing the magnetic force on each of the many individual charges that comprise the current.
What is the relation between magnetic field current and distance in case of a straight current carrying conductor Class 10?
Magnetic field is directly proportional to the current passing through the wire and it
is inversely proportional to the distance from the wire
.
What is the relation between magnetic field and current and distance in case of a straight current carrying conductor?
Magnetic field strength is inversely proportional to the distance from the wire
i.e. begin{align*}B propto frac{1}{r}end{align*}, greater the distance from the current carrying conductor, weaker will be the magnetic field.
What is the equation for magnetic field?
The magnitude of the force on a wire carrying current I with length L in a magnetic field is given by the equation.
F=ILBsinθ
where θ is the angle between the wire and the magnetic field. The force is perpendicular to the field and the current.
What is importance of magnetic field?
Earth’s magnetic field is thought to play an
important role in making the planet habitable
. Not only does a magnetic field set the direction of our compass needles, it also acts as a shield of sorts, deflecting away solar wind that might otherwise eat away at the atmosphere.
How does current affect magnetic field?
Current is
directly proportional to magnetic force
for a straight current carrying conductor in a uniform magnetic field. So the force is directly proportional to the size of the current. … If the current is increased by five times the force will also increase by five times.
What is difference between magnetic field and magnetic force?
The magnetic force
always acts in a direction perpendicular to the motion of the charge
. The space or the region around a magnet within which magnetic force is exerted on other magnet is called as the magnetic field.
What are the factors affecting the magnetic field?
Factors Affecting the Strength of the Magnetic Field of an Electromagnet: Factors that affect the strength of electromagnets are
the nature of the core material, strength of the current passing through the core, the number of turns of wire on the core and the shape and size of the core
.
Who discovered the magnetic effects of current?
The magnetic effect of electric current was discovered by
Hans Christian Oersted
in the year 1982.
What is the magnetic field pattern due to current carrying conductor?
The Magnetic field lines around a straight conductor carrying current are
concentric circles whose centres lie on the wire
. The direction of magnetic field lines can be determined using Right-Hand Thumb Rule.
What is current formula?
The current is the ratio of the potential difference and the resistance. It is represented as (I). The current formula is given as
I = V/R
. The SI unit of current is Ampere (Amp).
What is the symbol for magnetic field?
| SI electromagnetism units v t e | Symbol Name of quantity Symbol | B magnetic flux density, magnetic induction T | Φ, Φ M , Φ B magnetic flux Wb | H magnetic field strength A/m |
|---|
How do you calculate total magnetic field?
If the current has a vector direction out of the page (or screen), what is the direction of the magnetic field? Answer: The magnitude of the magnetic field can be calculated using the formula: The magnitude of the magnetic field
is 6.00 x 10
– 6
T
, which can also be written as (micro-Tesla).
Is Earth losing its magnetic field?
‘
Earth’s magnetic field
is vital to life on our planet. … Over the last 200 years, the
magnetic field
has lost around 9% of
its
strength on a global average. A large region of reduced
magnetic
intensity has developed between Africa and South America and is known as the South Atlantic Anomaly.
What is required for a magnetic field?
Although atoms often have many electrons, they mostly ‘pair up’ in such a way that the overall magnetic field of a pair cancels out. Two electrons paired in this way are said to have opposite spin. So if we want something to be magnetic we need
atoms that have one or more unpaired electrons with the same spin
.
