9. A. B. C. D. A charged sphere is dropped from height H. Which of the following holds true for the sphere's magnetic field? As long as its charge does not change, the sphere's magnetic field will remain the same as it travels downward. The bigger H is, the greater the magnetic field gets when the sphere reaches the ground. The sphere only has an electric field and no magnetic field. The sphere's acceleration will be greatly affected by the force applied by the sphere's magnetic field.

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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.