An az oriented solenoidal coil with 1000 turns per meter has a diameter of 2 cm and is 20 cm long. It is filled with an iron bar with a lr = 10 lo of the same size. The iron has a density of 7.87 g/cm3. %3D Choose the minimum current that is required to keep the iron bar inside the solenoid in the earth's gravitational field of -9.8 m/sec2 a, (in other words, so that it will not fall)?

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Q: tic field exceeds 0.10

A: The formula to calculate the magnitude of magnetic field is,Thus, the current will be,

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A: Given: w =1.8 cm =1.8*10-2 mt = 1.0 mm =1.0 *10-3 mB=1.2 TI=15 A∆V=1.02 μV=1.02*10-6 V

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Q: To scan a patient, you need a magnetic filed of 0.4 Tesla. You have a solenoid of length 0.08 meters…

A: Numbers of turn = 1500 Magnetic field (B) = 0.4 T Length = L = 0.08 m

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A: radius of the loop (r) = 1 cm = 0.01 m Current in the loop (I) = 3 Amps

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Q: A current I flows in a w x w square loop in free space as in figure. Find the magnitude of magnetic…

A: Concept used: Magnetic flux density is inversely proportional to distance to field point.

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Q: A piece of copper wire has a resistance per unit length of 4.63 x 10/m. The wire is wound into a…

A: Given  Resistance per unit length = 4.63 × 10-3  ohm/m  Applied potential difference V = 12 Volt…

Q: Tutorial Exercise In an experiment designed to measure the Earth's magnetic field using the Hall…

A: Given that  thickness t = 0.415 cm                     current = 8 A         hall voltage = 5.52…

Magnetic Field Of Coaxial Cable

The word coaxial means same axis. So for a long straight cable to be coaxial, it must have concentric cylindrical shaped conductor around it. Coaxial cable (popularly called ‘coax’) has various applications ranging from current conductors to radiofrequency signal transmitters. This cable has lower emission losses and provides protection from electromagnetic interference which allows signals with less power to transmit over longer distances.For example, currents produced in the pickup of a stereo turntable generally travel to the amplifier through a coaxial cable.The self-inductance of a coaxial cable is another important characteristic, because it influences the propagation of electrical signals in the cable.