A. Up B. Down C. Right D. Left 9. A loop of wire sits in an unchanging magnetic field. Which of the following is a NOT a way to induce a current through the loop? A. Rotate the loop about its diameter C. Stretch the loop B. Spin the loop about its center D. Squeeze the loop 10. Which of the following statements is NOT true about DC current flow? A. DC current flows from negative to positive. C. Battery operated items are examples of DC power. B. DC current flows at a constant rate. D. All DC powered items need to be plugged in. 11. The unidirectional current is called A. alternating current 12. The supply of electrical energy for a consumer is usually by AC because A. transmission and distribution are easily done. B. it most suitable for variable speed motor. B. electric charge C. direct current D. indirect current C. the voltage drop in cables is minimal. D. cable power losses are negligible.

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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.