Friday, Sep 11, 2026 The claims desk. Receipts included. POWERED BY LENZ ↗
IsThis

Ohm’s law (V = I·R) is routinely used to analyze MFC circuit resistance.

The Claim

Electrical resistance in microbial fuel cell circuits can be analyzed using Ohm's law (V = I·R).

Verified by Lenz ·

The Short Version

The statement is well supported by standard microbial fuel cell practice. Peer-reviewed reviews and methods papers routinely use Ohm’s law to calculate current through known external resistors and to estimate effective resistance, especially in the linear ohmic region. MFCs can depart from simple ohmic behavior outside that region, but that limits precision rather than the basic applicability of V = I·R.

Caveats

  • Ohm’s law is most reliable for the external load and the linear ohmic region of the polarization curve, not as a full model of all MFC behavior.
  • At low and high current densities, activation and mass-transfer losses can make the cell deviate from a simple V = I·R relationship.
  • Resistance estimated from polarization curves may reflect effective/internal resistance and can include non-ohmic losses, not just pure ohmic resistance.

The Receipts

  1. Fate of three bioluminescent pathogenic bacteria fed through ... - PMC

    PubMed Central

  2. A Critical Review on Fate, Risk, and Remediation of Heavy Metals in Electrochemically Active Biofilms

    Frontiers in Microbiology

  3. A comprehensive review of microbial fuel cells considering materials, configurations and applications

    Frontiers in Energy Research (via PubMed Central)

  4. Microbial fuel cells: a comprehensive review for beginners

    National Center for Biotechnology Information (NCBI) / Environmental Chemistry Letters

  5. Microbial fuel cells: An overview

    Journal of Physics: Conference Series (IOP)

  6. Scaling up microbial fuel cells for wastewater treatment: A review

    Environmental Research Letters (IOPscience)

  7. Electrochemical impedance spectroscopy applied to microbial fuel cells: A review

    Frontiers in Microbiology

  8. Microbial fuel cells: methodology and technology

    PubMed (Biotechnology Advances)

  9. Importance of reactor configuration in determining electricity generation from microbial fuel cells

    PubMed / Environmental Science & Technology

  10. Characterization of microbial fuel cell power output using different external resistances

    Journal of The Electrochemical Society (IOPscience)

+ 13 more sources — see the full list on Lenz

Filed Under

Microbial Fuel CellOhm's Law

More Fact Checks