Hall potentials are much larger for poor conductors than for good conductors. Why?

Q: The switch has been in position a for a long time. At t= 0, it moves to position b. Calculate (t for…

A: This circuit is an RC circuit. When the switch is at a fro a long time the capacitor will become…

Q: why must the correct polarity be known when connecting equipment to a voltage source?

A: Most multimeters, including digital multimeters, can do this. Regarding alternating current in the…

Q: Can we detect the inertia of electricity?

A: Yes it is possible to detect the inertia of electricity.

Q: Materials (Comb, Rubber Band, Book, Pen, Key, Spoon, Coins, Can). Distinguish the following…

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Q: A scalar potential of a field is equal to 1/r. Can it be magnetic field? Why?

A: The divergence of magnetic field whether it be due to steady or unsteady current source is always…

Q: What is the direction of the magnetic field at point B due to I2 only? O a. +x direction o b. +y…

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Q: A magnet is removed from a refrigerator door and Placed on a table. in 1-2 sentences, expiain how…

A: refrigerator is made up of a metal and magnets can be attached to it so you can attach two magnets…

Q: 7) Currents induced by rapid field changes in an MRI solenoid can, in some cases, heat tissue in the…

A: a) Change in magnetic field,  ∆B=B2-B1∆B=0-1.6 ∆B=-1.6 T Length of the loop, L=8 cm=0.08 m Radius of…

Q: (a) Two long parallel wires, each 2.0 mm in diameter and 9.00 cm apart, carry equal 1.0-A currents…

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Q: For which of the helices shown in the figure is the relation between the polarity of the battery and…

A: We know that current in a circuit flows from negative terminal to positive terminal of battery.

Q: -The magnitude of the magnetic force

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Q: The force produced by two parallel wires with currents running in the same direction will be…

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Q: So the rod is less positive than it was originally? Did the electrons induced in the inner shell…

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Q: Just after the switch has been closed, why does I=0?

A: Just after the switch has closed, voltage induced across the inductor. And from Lenz's law , voltage…

Ferromagnetism

Ferromagnetism is a mechanism by which some materials show magnetic properties. Iron and magnetite, an oxide of iron, are two naturally occurring materials that show the property of ferromagnetism. The word ferromagnetism is derived from the Latin name of iron, "Ferrum" as it was the first observed material to show such property. The property of ferromagnetism is shown by only a few substances such as iron, nickel, cobalt, and their alloys. Some transition metals and alloys of rare-earth metals also show ferromagnetism.