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What is the formula of magnitude of magnetic field?

The magnitude of the force is F = qvB sinθ where θ is the angle < 180 degrees between the velocity and the magnetic field. This implies that the magnetic force on a stationary charge or a charge moving parallel to the magnetic field is zero. 3. The direction of the force is given by the right hand rule.

How do you find the magnetic field at a point?

The magnetic field at point P is calculated by the Biot-Savart law: B=μ04πIΔlsinθr2=(1×10−7T⋅m/A)(2A(0.01m)sin(89.4°)(1m)2)=2.0×10−9T. From the right-hand rule and the Biot-Savart law, the field is directed into the page.

What is the direction of the magnetic field at the point P?

If the current in this wire is into the page, what is the direction of the magnetic field at point P? Using the right-hand rule to determine the direction of the magnetic field around a wire, the magnetic field will point in the clockwise direction.

What is the magnitude of magnetic field at the Centre of the coil?

Hence the magnetic field at the center of the circular coil is B=μ0i2r.

What is meant by toroid?

1 : a surface generated by a closed plane curve rotated about a line that lies in the same plane as the curve but does not intersect it. 2 : a body whose surface has the form of a toroid.

Where is toroid used?

A toroid is a coil of insulated or enameled wire wound on a donut-shaped form made of powdered iron. A toroid is used as an inductor in electronic circuits, especially at low frequencies where comparatively large inductances are necessary.

What shape is a toroid?

A toroid is a geometric shape that resembles a torus. A toroid is constructed by rotating a geometrical shape around an axis which is outside the shape. If this is done to a circle, a torus results. This short article about mathematics can be made longer.

What is a toroid in physics?

Toroid is a hollow circular ring on which a large number of turns of a wire are closely wound. It can be viewed as a solenoid which has been bent into a circular shape to close on itself.

Why magnetic field outside the toroid is 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 inside a magnetic field?

In a permanent magnet, the magnetic field comes from the motion of the electrons inside the material, or, more precisely, from something called the electron spin. The electron spin is a bit like the Earth spinning on its axis. The magnetic field is a vector, the same way the electric field is.

What are 3 ways to demagnetize a magnet?

Demagnetization processes include heating past the Curie point, applying a strong magnetic field, applying alternating current, or hammering the metal. Demagnetization occurs naturally over time.

Why does my freezer door not seal?

Crumbs or dust present in the grooves of the seal, also known as a gasket, will prevent the freezer door from sealing tightly and evenly as it should. If the freezer door still does not seal properly after a thorough cleaning, you will need to replace it.

What causes freezer to frost up?

Frost inside your freezer is caused by moisture coming into contact with the coils inside the appliance and freezing. This is caused by several factors, including dehydration from changes in temperature within your freezer, exposure to air and food being in the freezer for too long.