A particle with electric charge is fired into a region of space where the electric field is zero. It moves in a straight line. Can you conclude that the magnetic field in that region is zero? (a) Yes, you can. (b) No; the field might be perpendicular to the particle’s velocity. (c) No; the field might be parallel to the particle’s velocity. (d) No; the particle might need to have charge of the opposite sign to have a force exerted on it. (e) No; an observation of an object with electric charge gives no information about a magnetic field.

Q: "A straight wire that is 0.60 m long and carrying a current of 2.0 A, is placed at an angle with…

A:

Q: The magnetic field at the centre of a circular loop of wire of radius 1.50 cm is 3.48 × 10^−4 T in…

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Q: Earth’s magnetic field approximates that of a dipole with a field of 6×10−5 T at the North Pole.…

A: Motional induced emf = Blv

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.