A particle with charge 3.50 x 10-19 C travels in a circular orbit with radius 5 mm due to the force exerted on it by a magnetic field with magnitude 2 T and direction perpendicular to the orbit. (i) What is the magnitude of the linear momentum of the particle? (p=mv). Answer: Answer (a) 3.5 x 10-21           (b) 3.5 x 10-20           (c) 3.5 x 10-19           (d) 3.5 x 10-18 (ii) What is the magnitude of the angular momentum of the particle? (L=rmvsinθL=rmvsinθ ). Answer: Answer (a) 1.75 x 10-20         (b) 1.75 x 10-21         (c) 1.75 x 10-22      (d) 1.75 x 10-23

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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.