Lec17 - Purdue Physics
... moving away Magnetic moment created by induced currrent I attracts the bar magnet. Force on ring is attractive. ...
... moving away Magnetic moment created by induced currrent I attracts the bar magnet. Force on ring is attractive. ...
PHET Magnetism
... 5. Using either Microsoft Excel or graph paper, graph the compass position on the x-axis and magnetic field magnitude on the y-axis. Print your graph. Make sure to label the axes and title the graph. a. Is your graph symmetric? b. Using your graph, what is the relationship between magnetic field str ...
... 5. Using either Microsoft Excel or graph paper, graph the compass position on the x-axis and magnetic field magnitude on the y-axis. Print your graph. Make sure to label the axes and title the graph. a. Is your graph symmetric? b. Using your graph, what is the relationship between magnetic field str ...
Magnetic Forces and Magnetic Fields
... Magnets orient themselves in roughly a north - south direction if they are allowed to rotate freely (compass). Assume that a magnet has bar form. Objects are attracted most strongly to the ends of the magnet called poles. There are two poles: • north pole and • south pole Magnetic poles exert attrac ...
... Magnets orient themselves in roughly a north - south direction if they are allowed to rotate freely (compass). Assume that a magnet has bar form. Objects are attracted most strongly to the ends of the magnet called poles. There are two poles: • north pole and • south pole Magnetic poles exert attrac ...
Electromagnetism - SpongeOfKnowledge
... m and is 0.37 m long. What is the magnetic field strength in the centre of this solenoid? (a) 8.7 x 10-3 T (b) 6.2 x 10-2 T (c) 1.2 x 10-1 T (d) 3.0 x 10-1 T 36. A 200-turn copper coil of radius 0.050 m is perpendicular to a 0.087 T magnetic field. The magnetic field collapses to zero in 0.63 s. Wha ...
... m and is 0.37 m long. What is the magnetic field strength in the centre of this solenoid? (a) 8.7 x 10-3 T (b) 6.2 x 10-2 T (c) 1.2 x 10-1 T (d) 3.0 x 10-1 T 36. A 200-turn copper coil of radius 0.050 m is perpendicular to a 0.087 T magnetic field. The magnetic field collapses to zero in 0.63 s. Wha ...
Chapter 14: Magnets and Electromagnetism 1. Electrons flow
... C. scientists have not determined which one yet. Answer: B 23. Two long bar magnets are aligned so that north poles face each other. The magnets are separated by 1 cm, and a repulsive force between the north poles is 0.10 N. When the separation is increased to 2 cm the force will be A. 0.10 N. B. 0. ...
... C. scientists have not determined which one yet. Answer: B 23. Two long bar magnets are aligned so that north poles face each other. The magnets are separated by 1 cm, and a repulsive force between the north poles is 0.10 N. When the separation is increased to 2 cm the force will be A. 0.10 N. B. 0. ...
Science Unit: Concepts in Electricity Lesson 5: Magnets and Iron
... A field is a physical quantity that has a value for each point in space and time. For example, in a weather forecast, the wind velocity is described by assigning a vector (you can imagine that a vector is just a little arrow) to each point in space. Each vector represents the speed (say, the length/ ...
... A field is a physical quantity that has a value for each point in space and time. For example, in a weather forecast, the wind velocity is described by assigning a vector (you can imagine that a vector is just a little arrow) to each point in space. Each vector represents the speed (say, the length/ ...
Magnetism - Northern Highlands
... 3. Two magnetic north poles _____ each other. Two south poles _____ each other. A north pole and a south pole _____ each other. 4. Magnetic field lines outside a magnet always point away from its _____ pole and toward its _____ pole. 5. The diagram below shows the magnetic field in a region. The sou ...
... 3. Two magnetic north poles _____ each other. Two south poles _____ each other. A north pole and a south pole _____ each other. 4. Magnetic field lines outside a magnet always point away from its _____ pole and toward its _____ pole. 5. The diagram below shows the magnetic field in a region. The sou ...
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.