Snímek 1 - Cesta k vědě - Gymnázium Jaroslava Seiferta
... magnetic field and Larmor frequency in these the resonation of the sample happens. We know the exact value of the frequency, because the oscillator creates it. But the value of magnetic field is measured only indirectly from the value of electric current in the coils. The dependence of magnetic fiel ...
... magnetic field and Larmor frequency in these the resonation of the sample happens. We know the exact value of the frequency, because the oscillator creates it. But the value of magnetic field is measured only indirectly from the value of electric current in the coils. The dependence of magnetic fiel ...
hw09
... *1. (II) At a given instant, a 1.8-A current flows in the wires connected to a parallelplate capacitor. What is the rate at which the electric field is changing between the plates if the square plates are 1.60 cm on a side? Solution The current in the wires must also be the displacement current in t ...
... *1. (II) At a given instant, a 1.8-A current flows in the wires connected to a parallelplate capacitor. What is the rate at which the electric field is changing between the plates if the square plates are 1.60 cm on a side? Solution The current in the wires must also be the displacement current in t ...
Magnetism - effinghamschools.com
... 1) Ferromagnetic materials a) are strongly attracted to magnets b) include iron, cobalt, and nickel c) have many unpaired electrons, with identical spins d) all of these 2) Magnetic monopoles a) would have north or south poles alone b) do not exist c) both a and b d) neither a nor b ...
... 1) Ferromagnetic materials a) are strongly attracted to magnets b) include iron, cobalt, and nickel c) have many unpaired electrons, with identical spins d) all of these 2) Magnetic monopoles a) would have north or south poles alone b) do not exist c) both a and b d) neither a nor b ...
problems
... 10. An electron moving at velocity v in the x direction through a magnetic field which is uniform and in the –z direction with magnitude B = 0.10 T experiences an acceleration of 6.0 × 1015 m/s2. (a) Find the force on the electron (b) What is the electron’s speed? (c) By how much does its speed chan ...
... 10. An electron moving at velocity v in the x direction through a magnetic field which is uniform and in the –z direction with magnitude B = 0.10 T experiences an acceleration of 6.0 × 1015 m/s2. (a) Find the force on the electron (b) What is the electron’s speed? (c) By how much does its speed chan ...
magnetic field - Rosehill
... end of a magnet and enter the South end of a magnet. If you take a bar magnet and break it into two pieces, each piece will again have a North pole and a South pole. If you take one of those pieces and break it into two, each of the smaller pieces will have a North pole and a South pole. No matter h ...
... end of a magnet and enter the South end of a magnet. If you take a bar magnet and break it into two pieces, each piece will again have a North pole and a South pole. If you take one of those pieces and break it into two, each of the smaller pieces will have a North pole and a South pole. No matter h ...
Physics 2145 Spring 2016 Test 3 (4 pages)
... the same current. Which statement is true about magnetic flux and torque? A) Loop 1 has zero flux and loop 2 has maximum torque. B) Loop 1 has maximum flux and loop 2 has maximum torque. C) Loop 2 has maximum flux and loop 1 has zero torque. D) Loop 2 has zero flux and loop 1 has maximum torque. ...
... the same current. Which statement is true about magnetic flux and torque? A) Loop 1 has zero flux and loop 2 has maximum torque. B) Loop 1 has maximum flux and loop 2 has maximum torque. C) Loop 2 has maximum flux and loop 1 has zero torque. D) Loop 2 has zero flux and loop 1 has maximum torque. ...
TAP 411-2: Brush up on magnetism
... sketch the field line patterns associated with two poles that are attracting and two that are repelling; ...
... sketch the field line patterns associated with two poles that are attracting and two that are repelling; ...
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.