Lecture 9: 26-11-15
... Counterclockwise loop Magnetic dipole µ, points out of page Loops cancel, no net current inside Net current around outside ...
... Counterclockwise loop Magnetic dipole µ, points out of page Loops cancel, no net current inside Net current around outside ...
Document
... layer of ions, which has the same absolute charge but opposite sign with respect to that of the surface charge. The electric field also exerts a force on the ions in the diffuse layer which has direction opposite to that acting on the surface charge. This latter force is not actually applied to the ...
... layer of ions, which has the same absolute charge but opposite sign with respect to that of the surface charge. The electric field also exerts a force on the ions in the diffuse layer which has direction opposite to that acting on the surface charge. This latter force is not actually applied to the ...
magnetic field
... Magnetic Field Lines Every magnet has two poles (north and south). The magnetic field, or strength of the magnet, is concentrated at the poles. The field exists in all directions but decreases in strength as distance from the poles increases. Fig. 13-2b: Field indicated by lines of force. Co ...
... Magnetic Field Lines Every magnet has two poles (north and south). The magnetic field, or strength of the magnet, is concentrated at the poles. The field exists in all directions but decreases in strength as distance from the poles increases. Fig. 13-2b: Field indicated by lines of force. Co ...
I 1
... There are two BIG IDEA equations buried in this chapter. It is not obvious where they are, because we are so focused on details when we learn this material for the first time. One of the big ideas arises from the observation that magnetic poles always come in pairs, unlike + and – charged particles. ...
... There are two BIG IDEA equations buried in this chapter. It is not obvious where they are, because we are so focused on details when we learn this material for the first time. One of the big ideas arises from the observation that magnetic poles always come in pairs, unlike + and – charged particles. ...
Magnetic effects of electric current
... 24. How are different components arranged in electric motor? A. An electric motor consists of a rectangular coil ABCD of insulated copper wire. The coil is placed between the two poles of the magnetic field such that the arm AB and CD perpendicular to the direction of the magnetic field. The ends o ...
... 24. How are different components arranged in electric motor? A. An electric motor consists of a rectangular coil ABCD of insulated copper wire. The coil is placed between the two poles of the magnetic field such that the arm AB and CD perpendicular to the direction of the magnetic field. The ends o ...
Electric Field - Sites at Penn State
... realistic to look at the interaction of two charges on a same plane. In Figure 1 (a), a positive and a negative charges are present. Therefore, the electric field lines are directed towards the negative charge. In Figure 1 (b), the charges are equal and the electric field lines are repelling one ano ...
... realistic to look at the interaction of two charges on a same plane. In Figure 1 (a), a positive and a negative charges are present. Therefore, the electric field lines are directed towards the negative charge. In Figure 1 (b), the charges are equal and the electric field lines are repelling one ano ...
20-turn coil - ECE UC Davis
... is counteracting the magnetic force, which is pushing the wires apart. According to Section 5-3, the magnetic force is repulsive when the currents are in opposite directions. Figure P5.16(b) shows forces on wire 1 of part (a). The quantity F′ is the tension force per unit length of wire due to the m ...
... is counteracting the magnetic force, which is pushing the wires apart. According to Section 5-3, the magnetic force is repulsive when the currents are in opposite directions. Figure P5.16(b) shows forces on wire 1 of part (a). The quantity F′ is the tension force per unit length of wire due to the m ...
Problem 27.15 An electron at point A has a speed of 1.41 x 106 m/s
... In Fig. 27.36 (a), the current loop has a magnetic dipole moment which is anti-aligned with the magnetic moment of the bar magnet. The force on a section of the loop has a radial component, and a component to the right. The radial components cancel and the net force on the loop is to the right. So, ...
... In Fig. 27.36 (a), the current loop has a magnetic dipole moment which is anti-aligned with the magnetic moment of the bar magnet. The force on a section of the loop has a radial component, and a component to the right. The radial components cancel and the net force on the loop is to the right. So, ...
ppt
... The potential difference between the ends of the conductor can be found by •V=BvL • The upper end is at a higher potential than the lower end ...
... The potential difference between the ends of the conductor can be found by •V=BvL • The upper end is at a higher potential than the lower end ...
Induced EMFs and Electric Fields
... path may not be a circle, therefore, Faraday’s law of induction can be written as: -dΦm E•ds= dt • The induced electric field E is a non-conservative, time-varying field that is generated by a changing magnetic field. • The induced electric field E can’t be an electrostatic field because if the fiel ...
... path may not be a circle, therefore, Faraday’s law of induction can be written as: -dΦm E•ds= dt • The induced electric field E is a non-conservative, time-varying field that is generated by a changing magnetic field. • The induced electric field E can’t be an electrostatic field because if the fiel ...
Magnetic field
A magnetic field is the magnetic effect of electric currents and magnetic materials. The magnetic field at any given point is specified by both a direction and a magnitude (or strength); as such it is a vector field. The term is used for two distinct but closely related fields denoted by the symbols B and H, where H is measured in units of amperes per meter (symbol: A·m−1 or A/m) in the SI. B is measured in teslas (symbol:T) and newtons per meter per ampere (symbol: N·m−1·A−1 or N/(m·A)) in the SI. B is most commonly defined in terms of the Lorentz force it exerts on moving electric charges.Magnetic fields can be produced by moving electric charges and the intrinsic magnetic moments of elementary particles associated with a fundamental quantum property, their spin. In special relativity, electric and magnetic fields are two interrelated aspects of a single object, called the electromagnetic tensor; the split of this tensor into electric and magnetic fields depends on the relative velocity of the observer and charge. In quantum physics, the electromagnetic field is quantized and electromagnetic interactions result from the exchange of photons.In everyday life, magnetic fields are most often encountered as a force created by permanent magnets, which pull on ferromagnetic materials such as iron, cobalt, or nickel, and attract or repel other magnets. Magnetic fields are widely used throughout modern technology, particularly in electrical engineering and electromechanics. The Earth produces its own magnetic field, which is important in navigation, and it shields the Earth's atmosphere from solar wind. Rotating magnetic fields are used in both electric motors and generators. Magnetic forces give information about the charge carriers in a material through the Hall effect. The interaction of magnetic fields in electric devices such as transformers is studied in the discipline of magnetic circuits.