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  2. Toroidal inductors and transformers - Wikipedia

    en.wikipedia.org/wiki/Toroidal_inductors_and...

    Because the toroid is a closed-loop core, it will have a higher magnetic field and thus higher inductance and Q factor than an inductor of the same mass with a straight core (solenoid coils). This is because most of the magnetic field is contained within the core.

  3. Inductance - Wikipedia

    en.wikipedia.org/wiki/Inductance

    Inductance is defined as the ratio of the induced voltage to the rate of change of current causing it. [1] It is a proportionality constant that depends on the geometry of circuit conductors (e.g., cross-section area and length) and the magnetic permeability of the conductor and nearby materials. [1]

  4. Anderson's bridge - Wikipedia

    en.wikipedia.org/wiki/Anderson's_bridge

    In electronics, Anderson's bridge is a bridge circuit used to measure the self-inductance of the coil. It enables measurement of inductance by utilizing other circuit components like resistors and capacitors. [1] Anderson's bridge was invented by Alexander Anderson in 1891. [2]

  5. Inductor - Wikipedia

    en.wikipedia.org/wiki/Inductor

    Formula Notes Cylindrical air-core coil [26] = L = inductance in henries (H) μ 0 = permeability of free space = 4 × 10 −7 H/m; K = Nagaoka coefficient [26] [a] N = number of turns; A = area of cross-section of the coil in square metres (m 2) ℓ = length of coil in metres (m)

  6. Bifilar coil - Wikipedia

    en.wikipedia.org/wiki/Bifilar_coil

    In electrical terms, this means that the self-inductance of the coil is zero. The bifilar coil (more often called the bifilar winding) is used in modern electrical engineering as a means of constructing wire-wound resistors with negligible parasitic self-inductance. [1] Bifilar wound toroidal transformer, also known as a common-mode choke

  7. Mortgage rates stay flat as Trump’s second term comes into ...

    www.aol.com/finance/mortgage-rates-stay-flat...

    Mortgage rates stalled an upward rise this week as financial markets adjusted to a second Trump presidency. The average 30-year mortgage rate was essentially unchanged at 6.78% for the week ...

  8. Trump mocks Justin Trudeau over top official’s shocking exit ...

    www.aol.com/trump-mocks-justin-trudeau-top...

    Donald Trump mocked Canadian Prime Minister Justin Trudeau over his top minister’s surprise resignation — after the pair clashed on how to handle the president-elect’s looming tariffs.

  9. Permeability (electromagnetism) - Wikipedia

    en.wikipedia.org/wiki/Permeability...

    For example, 4% electrical steel has an initial relative permeability (at or near 0 T) of 2,000 and a maximum of 38,000 at T = 1 [5] [6] and different range of values at different percent of Si and manufacturing process, and, indeed, the relative permeability of any material at a sufficiently high field strength trends toward 1 (at magnetic ...