The resistance of the loop in the figure is 0.30 Ω. a) Is the magnetic field…
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Question “The resistance of the loop in the figure is 0.30 Ω. a) Is the magnetic field…”
The resistance of the loop in the figure is 0.30 Ω.
a) Is the magnetic field strength increasing or decreasing?
Answer
Ampere’s right-hand rule, Faraday’s law of induction, and Ohm’s laws are the concepts that were used to solve this problem.
Begin by using Ampere’s right-hand rule to determine the magnetic field strength.
Finally, compare Ohm’s and Faradays laws to determine the rate of change in the magnetic field.
According to the Ampere’s right-hand rule, “The index finger, middle fingers and thumb are held mutually parallel to one another, the index finger indicates the direction and current direction, while the middle finger indicates the direction and direction of magnetic fields, and the thumb points in the direction and force exerted on the conducting material”.
Faraday’s law on electromagnetic induction states, “The induced emf of any closed circuit equals the rate of magnetic flux change linked in that closedcircuit.”
Ohm’s law says that at constant temperature, a steady current flows through conductor. This is directly proportional the potential difference in conductor.
This is the Ohm’s Law expression:
acts as the electromotive force.
resists.
The rate at which the magnetic flux changes is called the electromotive force.
This is the Faraday’s law for induction:
represents the electromotive force, $6$ the number of turns and $7media_tag_7$ the magnetic flux. $8$ the time.
The square’s area is as follows:
refers to the area and A the length and breadth respectively of the square loop.
This is the expression for magnetic flux:
B here is the magnetic field.
(a)
According to Amperes’ right hand rule, if a person’s right hand wraps around the rod and the current in the loop causes an induced magnetic field, it points out of the page. Because of that induced current, which creates a magnetic force against the particle’s charge, the external magnetic field is entering the page.
The magnetic field strength therefore increases.
(b)
This is the Ohm’s Law expression:
…… (1)
This is the Faraday’s law for induction:
In the equation above, replace
.
…… (2)
Compare equation (1) with (2).
In the equation above, replace
with A
Substitute
to I,
to R, and
to find
.
Ans: Part A
This will increase the strength of the magnetic field outside.
Part b
The rate of magnetic field change is
.
Conclusion
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