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Related Concept Videos

Oscillations In An LC Circuit01:31

Oscillations In An LC Circuit

An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
Electromagnetic Waves01:30

Electromagnetic Waves

James Clerk Maxwell formulated a single theory combining all the electric and magnetic effects scientists knew during that time, calling the phenomena his theory predicted “Electromagnetic waves”. He brought together all the work that had been done by brilliant physicists such as Oersted, Coulomb, Gauss, and Faraday and added his own insights to develop the overarching theory of electromagnetism. Maxwell’s equations, combined with the Lorentz force law, encompass all the laws of electricity and...
Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in the...
Applications of RC Circuits01:22

Applications of RC Circuits

A relaxation oscillator is one of the applications of RC circuits. A neon lamp relaxation oscillator comprises a capacitor, a resistor, a voltage source, and a lamp. The lamp acts like an open circuit, with infinite resistance until the potential difference across the lamp reaches a specific voltage. At that voltage, the lamp acts like a short circuit with zero resistance, and the capacitor discharges through the lamp, thus producing light. Once the capacitor is fully discharged through the...
RLC Circuit as a Damped Oscillator01:30

RLC Circuit as a Damped Oscillator

An RLC circuit combines a resistor, inductor, and capacitor, connected in a series or parallel combination.
Consider a series RLC circuit. Here, the presence of resistance in the circuit leads to energy loss due to joule heating in the resistance. Therefore, the total electromagnetic energy in the circuit is no longer constant and decreases with time. Since the magnitude of charge, current, and potential difference continuously decreases, their oscillations are said to be damped. This is...
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

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Related Experiment Video

Updated: Jul 18, 2026

Electric Cell-substrate Impedance Sensing for the Quantification of Endothelial Proliferation, Barrier Function, and Motility
12:30

Electric Cell-substrate Impedance Sensing for the Quantification of Endothelial Proliferation, Barrier Function, and Motility

Published on: March 28, 2014

Natural electrical RF oscillation from cells

H A Pohl

    Journal of Bioenergetics and Biomembranes
    |August 1, 1981
    PubMed
    Summary

    Electrical oscillatory radiofrequency phenomena occur during cell division, explained by micro-dielectrophoresis (micro-DEP). This study explores their role in cell division inhibition and oncogenic cell invasiveness, proposing experimental tests.

    Area of Science:

    • Cell Biology
    • Electrophysiology
    • Biophysics

    Background:

    • Cell division is associated with electrical oscillatory radiofrequency phenomena.
    • Micro-dielectrophoresis (micro-DEP) describes cell motion induced by nonuniform electric fields.
    • The role of these electrical phenomena in cell division regulation is not fully understood.

    Purpose of the Study:

    • To investigate the presence and nature of electrical oscillatory phenomena during cell division.
    • To theoretically explore the involvement of micro-DEP in contact inhibition and oncogenic cell invasiveness.
    • To propose experiments for validating these hypotheses.

    Main Methods:

    • Studying the attraction of cells towards polarizable powders to detect electrical phenomena.

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  • Theoretical exploration of micro-DEP in the context of cell division control and cancer cell behavior.
  • Formulating experimental designs to test proposed mechanisms.

    • Main Results:

    • Observed electrical oscillatory radiofrequency phenomena during cell division.
    • Theoretically linked micro-DEP to cell division inhibition and oncogenic invasiveness.
    • Proposed specific experimental approaches to further investigate these electrical effects.

    Conclusions:

    • Electrical oscillatory phenomena, mediated by micro-DEP, are integral to cell division.
    • Alterations in these electrical properties may contribute to cancer development and invasiveness.
    • Further experimental validation is crucial to confirm the proposed mechanisms.