AutoQuiz is edited by Joel Don, ISA's social media community manager.

This automation industry quiz question comes from ISA’s technical training course, Electrical Controls for the Control Systems Technician (TI23). This class focuses on electrical controls that are frequently overlooked in a formal training program. It is geared toward any level technician who wants a thorough review of electrical process concepts to reinforce their knowledge of basic electricity and develop skills required to install and maintain electrical control devices.

What is the total capacitance of the circuit in the post image?

a) 1.67 pF
b) 16.7 µf
c) 15.0 pf
d) 15.0 µf
e) none of the above

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Here’s the answer to this quiz question from ISA’s course offering, Electrical Controls for the Control Systems Technician (TI23).

Capacitance is defined as the ability of a dielectric to store electrical charge. The calculation of capacitance is reciprocally related to the calculation of resistance. Capacitance in parallel is calculated as the sum of the individual values and in series it uses the reciprocal method.

The correct answer is C.

calc capacitance-formula

About the Editor
Joel Don is the community manager for ISA and is an independent content marketing, social media and public relations consultant. Prior to his work in marketing and PR, Joel served as an editor for regional newspapers and national magazines throughout the U.S. He earned a master's degree from the Medill School at Northwestern University with a focus on science, engineering and biomedical marketing communications, and a bachelor of science degree from UC San Diego.

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