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  2. Magnetic monopole - Wikipedia

    en.wikipedia.org/wiki/Magnetic_monopole

    In particle physics, a magnetic monopole is a hypothetical elementary particle that is an isolated magnet with only one magnetic pole (a north pole without a south pole or vice versa). [1] [2] A magnetic monopole would have a net north or south "magnetic charge".

  3. Zeros and poles - Wikipedia

    en.wikipedia.org/wiki/Zeros_and_poles

    The Riemann zeta function is also meromorphic in the whole complex plane, with a single pole of order 1 at z = 1. Its zeros in the left halfplane are all the negative even integers, and the Riemann hypothesis is the conjecture that all other zeros are along Re( z ) = 1/2 .

  4. Single-phase electric power - Wikipedia

    en.wikipedia.org/wiki/Single-phase_electric_power

    A single-phase polemount stepdown transformer in Canada. One supply phase (phase-to-neutral) from the utility is converted to split-phase for the customers. In electrical engineering, single-phase electric power (abbreviated 1φ ) is the distribution of alternating current electric power using a system in which all the voltages of the supply ...

  5. Split-phase electric power - Wikipedia

    en.wikipedia.org/wiki/Split-phase_electric_power

    Pole-mounted single-phase transformer with three-wire center-tapped "split-phase" secondary. On the three secondary terminals, the center tap is grounded with a short strap to the transformer case. A split-phase or single-phase three-wire system is a type of single-phase electric power distribution.

  6. Multiway switching - Wikipedia

    en.wikipedia.org/wiki/Multiway_switching

    These switches appear externally similar to single pole, single throw (SPST) switches, but have extra connections which allow a circuit to be controlled from multiple locations. Toggling the switch disconnects one "traveler" terminal and connects the other. Electrically, a typical "3-way" switch is a single pole, double throw (SPDT) switch. By ...

  7. Pole figure - Wikipedia

    en.wikipedia.org/wiki/Pole_figure

    A pole figure is a graphical representation of the orientation of objects in space. For example, pole figures in the form of stereographic projections are used to represent the orientation distribution of crystallographic lattice planes in crystallography and texture analysis in materials science .