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  2. Output impedance - Wikipedia

    en.wikipedia.org/wiki/Output_impedance

    The actual output impedance for most devices is not the same as the rated output impedance. A power amplifier may have a rated impedance of 8 ohms, but the actual output impedance will vary depending on circuit conditions. The rated output impedance is the impedance into which the amplifier can deliver its maximum amount of power without failing.

  3. Electrical efficiency - Wikipedia

    en.wikipedia.org/wiki/Electrical_efficiency

    If energy output and input are expressed in the same units, efficiency is a dimensionless number. [1] Where it is not customary or convenient to represent input and output energy in the same units, efficiency-like quantities have units associated with them. For example, the heat rate of a fossil fuel power plant may be expressed in BTU per ...

  4. Impedance bridging - Wikipedia

    en.wikipedia.org/wiki/Impedance_bridging

    For devices with very high output impedances, such as with a guitar pickup or a high-Z mic, a DI box can help with impedance bridging by converting the high output impedances to a lower impedance so as to not require the receiving device to have outrageously high input impedance (which would suffer drawbacks such as increased noise in long ...

  5. Impedance matching - Wikipedia

    en.wikipedia.org/wiki/Impedance_matching

    Whenever a source of power with a fixed output impedance such as an electric signal source, a radio transmitter or a mechanical sound (e.g., a loudspeaker) operates into a load, the maximum possible power is delivered to the load when the impedance of the load (load impedance or input impedance) is equal to the complex conjugate of the ...

  6. Maximum power transfer theorem - Wikipedia

    en.wikipedia.org/wiki/Maximum_power_transfer_theorem

    The red curve shows the power in the load, normalized relative to its maximum possible. The dark blue curve shows the efficiency η. The efficiency η is the ratio of the power dissipated by the load resistance R L to the total power dissipated by the circuit (which includes the voltage source's resistance of R S as well as R L):

  7. Musk's SpaceX preparing to launch tender offer in Dec at $135 ...

    www.aol.com/news/musks-spacex-preparing-launch...

    By Krystal Hu and Kenrick Cai (Reuters) -Elon Musk's SpaceX is preparing to launch a tender offer in December to sell existing shares at a price of $135 per share, two sources familiar with the ...

  8. Energy conversion efficiency - Wikipedia

    en.wikipedia.org/wiki/Energy_conversion_efficiency

    The wall-plug efficiency is the measure of output radiative-energy, in watts (joules per second), per total input electrical energy in watts. The output energy is usually measured in terms of absolute irradiance and the wall-plug efficiency is given as a percentage of the total input energy, with the inverse percentage representing the losses.

  9. Most Seniors Say 2025 COLA Is Too Low: 3 Ways They Plan To ...

    www.aol.com/most-seniors-2025-cola-too-110053824...

    The Social Security Administration has announced of a 2.5% cost-of-living adjustment (COLA) for 2025 -- that's lower than the 3.2% increase in 2024 and 8.7% increase in 2023. The smaller COLA ...