What is toroid expression?
A toroid is a coil of insulated or enamelled wire wound on a doughnut -shaped form made of powdered iron. A toroid is used as an inductor in electronic circuits, especially at low frequencies where comparatively large inductance are necessary. Magnetic field due to toroid : – ∮B . dl =μ0I0.
Is magnetic field uniform in toroid?
The magnetic field inside a toroid is not uniform, as it varies inversely with the distance r from the axis OO’.
What is the formula of magnetic field of toroid?
The magnetic field of a current-carrying toroid is independent of the radius. This is because the magnetic field of the toroid is given as B = μonI where n is the number of turns, I is the electric current, and μo is the permeability.
What is toroid using Ampere’s law?
According to Ampere’s circuital law, ∮ B → . d L → = μ 0 I. Here current I flow through the ring as many times time as there are the number of turns. Thus the total current flowing through toroid is N I , where N is the total number of turns.
Why is the magnetic field outside a toroid zero?
After applying Ampere’s Law, we see that the magnetic field at any point outside the toroid is zero because the net electric current is zero.
What is the magnetic field at outside the toroid and inside in the open space of a toroid?
The number of turns per unit length is zero outside the toroid at any point. So the magnetic field will be zero at points outside and inside the toroid.
What is toroid obtain formula for the magnitude?
s law, `L=2pir_(3)`.
What is the magnetic moment of a toroid?
Answer: (c)In case of a toroid, the magnetic field is only confined inside the body of toroid in the form of concentric magnetic lines of force and there is no magnetic field outside the body of toroid. Thus the magnetic moment of toroid is zero.
What is the magnetic field inside a toroid?
The magnetic field in the open space inside (point P) and exterior to the toroid (point Q) is zero. The field B inside the toroid is constant in magnitude for the ideal toroid of closely wound turns.The direction of the magnetic field inside is clockwise as per the right-hand thumb rule for circular loops.
What is the difference between a solenoid and a toroid?
The solenoid is cylindrical in shape while the toroid is circular in shape. The formation of the magnetic field is outside the solenoid while the magnetic field is within the toroid. The magnetic field inside the solenoid is uniform while non-uniform in toroid. The magnetic field in solenoid is equal to μ0 n I while in toroid is μ N l / 2 π r.
What is the purpose of a toroid?
The toroid is a useful device used in everything from tape heads to tokamaks. Finding the magnetic field inside a toroid is a good example of the power of Ampere’s law. The current enclosed by the dashed line is just the number of loops times the current in each loop.
What is the turn density of a toroid?
The toroid is a useful device used in everything from tape headsto tokamaks. Magnetic field= permeabilityx turn densityx current For a solenoid of radius r= m with N= turns, the turn density is n=N/(2πr)=turns/m. If the current in the solenoid is I= amperes