Circuit Theory ENEE 122

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Questions and Answers

What is the unit of measurement for electric charge?

Volt (V)

Ohm (Ω)

Ampere (A)

Coulomb (C) (correct)

What is the formula to calculate electric charge?

q = e ^ n

q = n * e (correct)

q = e / n

q = n / e

What is the charge of a single electron?

-1.602 × 10^-19 C (correct)

1.602 × 10^-19 C

1.6 × 10^-19 C

6.24150962915265 × 10^18 C

What is the law that states that electric charge can be moved but not created or destroyed?

Law of conservation of charge Signup and view all the answers

What type of circuit element provides a specified voltage or current that is completely independent of other circuit variables?

Ideal independent voltage source Signup and view all the answers

What is the purpose of the resistor colour code table?

To determine the tolerance of a resistor Signup and view all the answers

What is the formula to calculate the minimum value of a resistor with a tolerance of 20%?

Minimum value = Nominal value - (20% of Nominal value) Signup and view all the answers

What is the name of the law that relates voltage, current, and resistance in a circuit?

Ohm's Law Signup and view all the answers

What is the primary objective of the circuit theory course?

To provide a solid theoretical and practical foundation for future courses in engineering programs Signup and view all the answers

What is an electric circuit?

An interconnection of electrical elements or wires Signup and view all the answers

What is the name of the lecturer for the course ENEE 122?

Dr. Ruhiya Abubakar Signup and view all the answers

What is the venue for the course ENEE 122?

G6 Signup and view all the answers

What is the name of one of the recommended books for the course ENEE 122?

Electrical Circuit Theory and Technology Signup and view all the answers

What is the primary function of a fuse in an electric circuit?

To protect the circuit from excessive current Signup and view all the answers

What is the term for the collection of circuit elements and wires?

Electric circuit Signup and view all the answers

What is the term for all components that make the transfer of charge in an electrical circuit possible?

Electric elements Signup and view all the answers

What is the formula for total resistance in series?

RT = R1+R2 Signup and view all the answers

What is the formula for total capacitance in parallel?

CT = C1+C2+C3+…….+CN Signup and view all the answers

What is the formula for total inductance in series?

LT = L1+L2+L3+……+LN Signup and view all the answers

What is a node in a circuit?

The point of connection between two and more branches Signup and view all the answers

What is the foundation of circuit analysis?

The defining equations of a circuit element Signup and view all the answers

What is Kirchhoff's Voltage Law?

The sum of voltages around a loop is zero Signup and view all the answers

What is a branch in a circuit?

A single two-terminal element in a circuit Signup and view all the answers

How can Kirchhoff's Laws be applied to Network solution?

By direct or indirect application to the network in conjunction with Ohm's Law or manipulation of component resistances Signup and view all the answers

Study Notes

Course Overview

The course introduces basic concepts of network and circuit analysis, providing a solid theoretical and practical foundation for future courses in engineering programs.

Electric Quantities

Electric charge is a property of matter, measured in SI units called "Coulomb (C)".
1 Coulomb is the total charge of 6.24150962915265×1018 electrons.
Electric charge can be moved but not created or destroyed (Law of Conservation of Charge).

Circuit Elements

Ideal Independent Source: provides a specified voltage or current, independent of other circuit variables.
Ideal Independent Voltage Source: provides a specified voltage.
Ideal Independent Current Source: provides a specified current.
Ideal Dependent Voltage Source: depends on other circuit variables.

Resistance

Resistance values exist within certain tolerance limits.
Tolerance is the maximum difference between the actual value and the required value, expressed as a plus or minus percentage value.

Ohm's Law

Relates voltage, current, and resistance in a circuit.
Derived units from Ohm's Law can be calculated.

Resistors

Resistors in series: RT = R1 + R2.
Resistors in parallel: 1/RT = 1/R1 + 1/R2.
Resistor colour code table: used to identify resistor values.

Capacitance and Inductance

Capacitors in parallel: CT = C1 + C2 + C3 + … + CN.
Capacitors in series: 1/CT = 1/C1 + 1/C2 + … + 1/CN.
Inductors in series: LT = L1 + L2 + L3 + … + LN.
Inductors in parallel: 1/LT = 1/L1 + 1/L2 + … + 1/LN.

Network Basics

Branch: a single two-terminal element in a circuit.
Node: the point of connection between two or more branches.
Loop: any closed path in a circuit.

Kirchhoff's Laws

Kirchhoff's Current Law (KCL): the sum of currents entering a node is equal to the sum of currents leaving a node.
Kirchhoff's Voltage Law (KVL): the sum of voltage changes around a loop is zero.
Kirchhoff's laws relate voltages and currents in different branches.

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Description

This course introduces basic concepts of network and circuit analysis, providing a solid theoretical and practical foundation for future courses in engineering programmes.