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  2. Open-circuit test - Wikipedia

    en.wikipedia.org/wiki/Open-circuit_test

    Circuit diagram for open-circuit test. The open-circuit test, or no-load test, is one of the methods used in electrical engineering to determine the no-load impedance in the excitation branch of a transformer. The no load is represented by the open circuit, which is represented on the right side of the figure as the "hole" or incomplete part of ...

  3. Science Research Associates - Wikipedia

    en.wikipedia.org/wiki/Science_Research_Associates

    Science Research Associates Inc. was founded in 1938 [1] with a trade and occupational focus. In 1957, it moved into individualized classroom instruction with the iconic SRA Reading Laboratory Kit, a format that they translated to mathematics, science, and social studies [ 1 ] commonly called SRA cards . [ 2 ]

  4. Continuity test - Wikipedia

    en.wikipedia.org/wiki/Continuity_test

    In electronics, a continuity test is the checking of an electric circuit to see if current flows (that it is in fact a complete circuit). A continuity test is performed by placing a small voltage (wired in series with an LED or noise-producing component such as a piezoelectric speaker ) across the chosen path.

  5. Breaking capacity - Wikipedia

    en.wikipedia.org/wiki/Breaking_capacity

    The prospective short-circuit current that can occur under short circuit conditions should not exceed the rated breaking capacity of the apparatus, otherwise breaking of the current cannot be guaranteed. The current breaking capacity corresponds to a certain voltage, so an electrical apparatus may have more than one breaking capacity current ...

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  7. Physical Science Study Committee - Wikipedia

    en.wikipedia.org/wiki/Physical_Science_Study...

    [1] [6]: 17 The non-profit Educational Service Incorporated, which became Education Development Center, was created to continue the work of PSSC. By the 1964–1965 school year, about half the US students enrolled in high school physics (200,000 students, 5000 teachers) were reportedly using the PSSC course materials. [ 6 ]

  8. Mortgage and refinance rates for Jan. 6, 2025: Average rates ...

    www.aol.com/finance/mortgage-and-refinance-rates...

    The unemployment rate edged up moderately to 4.2% from October's 4.1%. A new labor reading for December is due on January 10, 2025 — the first major economic report in the new year.

  9. Smith chart - Wikipedia

    en.wikipedia.org/wiki/Smith_chart

    The Smith chart (sometimes also called Smith diagram, Mizuhashi chart (水橋チャート), Mizuhashi–Smith chart (水橋スミスチャート), [1] [2] [3] Volpert–Smith chart (Диаграмма Вольперта—Смита) [4] [5] or Mizuhashi–Volpert–Smith chart), is a graphical calculator or nomogram designed for electrical and electronics engineers specializing in radio ...

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