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# 4. Properties of Current, Voltage, and Resistance in Series Circuits

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Lecture

In this mini-lecture, we discuss properties of series circuits, focusing in particular on: (i) current remaining the same in a circuit with only one path; (ii) the change in voltage at each resistor, which must add up to the total voltage at the battery; (iii) the total resistance R = V/I from Ohm’s Law, which is equal to the sum of the resistance from each resistor for series circuits; and (iv) a summary of the properties of series circuits: they have one path, the resistors are in series, one after the other, and that the total resistance is equal to the sum of the resistors.

Course

In this course, Professor David Berman (Queen Mary University of London) explores charge, energy, and circuits at a GCSE level. In the first mini-lecture, we look at charges, the force a charge experiences in an electric field, potential energy, potential difference (or ‘voltage’), and energy (or ‘work done’). In the second mini-lecture, we introduce current as the flow of charge and define it mathematically before going through a couple of examples. The third mini-lecture delves into circuits, introducing the concept of circuit diagrams, resistance and resistors, and Ohm’s Law, followed by a few examples. In the fourth mini-lecture, we discuss properties of current, voltage, and resistance in circuits and introduce the series circuit, a circuit with only one path that the current can take. The fifth mini-lecture introduces parallel circuits as circuits in which the current can take more than one path through the circuit, and then goes through an example, concluding with the equation for resistors in parallel.

Lecturer

David Berman is a Professor of Theoretical Physics at Queen Mary. His research interests include string theory and ideas in fundamental theoretical physics, including non-commutative geometry, black holes physics, and quantum gravity. He has contributed to the Radio 4 biography series Great Lives and the In Our Time podcasts, including Great Lives: Richard Feynman (2018), Great Lives: Galileo (2019), In Our Time: Emmy Noether (2019), and In Our Time: Paul Dirac (2020).

#### Cite this Lecture

APA style

Berman, D. (2022, January 12). Introduction to Electricity and Circuits - Properties of Current, Voltage, and Resistance in Series Circuits [Video]. MASSOLIT. https://massolit.io/courses/introduction-to-circuits/properties-of-current-voltage-and-resistance-in-series-circuits

MLA style

Berman, David. "Introduction to Electricity and Circuits – Properties of Current, Voltage, and Resistance in Series Circuits." MASSOLIT, uploaded by MASSOLIT, 12 Jan 2022, https://massolit.io/courses/introduction-to-circuits/properties-of-current-voltage-and-resistance-in-series-circuits