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Exam (elaborations)

Basic Electrical Principles – Comprehensive Guide

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Basic Electrical Principles – Comprehensive Guide

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  • October 9, 2024
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  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • EWRB
  • EWRB
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Zendaya
Basic Electrical Principles – Comprehensive Guide

What is a coulomb (Q)? Right Ans - A unit of one charge in which 1
electron= -1.6 X 10^-19 Q

What is Current Flow (Amps)? Right Ans - The rate of electron flow. A=1
Q/sec=6.2X10^18 electrons/sec.

What is voltage (V)? Right Ans - The force (difference in potential in EMF)
that causes electrons to move

What is Resistance (R)? Right Ans - The property of materials that opposes
or resists current by converting electricity to heat.

What factors affect resistance of a material? Right Ans - Length, Material
(specific resistance), Cross-sectional area (R=ρL/A)

What is Ohms Law? Right Ans - I=V/R

What is Equivalent Resistance? Right Ans - Equivalent Resistance is
essentially the total resistance of a circuit, and differs depending on the what
is in series vs parallel.

What is Kirchhoff's Laws? Right Ans - 1. The sum of all the currents
entering a junction equal the sum of all the current leaving the junction.
2. The sum of all the potential differences in a closed loop id equal to zero

What is Energy? Right Ans - Energy (E), is the ability or capacity to do work
measured in joules

What is Power? Right Ans - Power (P), refers to how rapidly energy is
being used or converted to another form. The rate of doing work.

What is Capacitance? Right Ans - Capacitance (C), is the property of an
electrical circuit that opposes change to voltage by using energy stored in an
electric field. C=Q/V where C is capacitance, Q is stored charge, and V is
voltage

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