An infinitely long straight wire carries an electric current I1 = 2 A to the left, a quarter-circle wire with a radius of 4 cm lies on a plane with a straight wire carrying an electric current I2 = 10 A to the left (see Figure). The distance of point O (center of a quarter circle) with a straight wire is a = 2 cm. Define: a. The magnitude and direction of the magnetic induction by the straight wire and the quarter circle is at point O. b. The magnitude and direction of the Lorentz force that acts when at point O there is an electron moving horizontally with a speed of 5.10^-5 m/s in the x+ direction.

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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.