CSM 153 Circuit Theory Quiz
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Questions and Answers

A capacitor stores electrical energy as potential energy in an electric field.

True

Which of these materials can be used as a dielectric in a capacitor?

  • Air (correct)
  • Oil (correct)
  • Mica (correct)
  • Plastic (correct)
  • All of the above (correct)

    • What is the unit of capacitance?

    Farad (F)

    The amount of charge Q that a capacitor can store depends on the applied ______ V.

    <p>voltage</p> Signup and view all the answers

    Match the following terms with their definitions:

    <p>Capacitor = An arrangement of two isolated conductors of any shape Dielectric = A non-conducting material that separates the plates of a capacitor Parallel-plate capacitor = An arrangement consisting of two parallel conducting plates separated by a distance Capacitance = The ratio of charge on a conductor to the potential it is raised</p> Signup and view all the answers

    What is the formula for the capacitance of a parallel plate capacitor in free space?

    <p>C = ε0A/d</p> Signup and view all the answers

    The energy density of an electric field in free space is proportional to the square of the electric field strength.

    <p>True</p> Signup and view all the answers

    The dielectric constant, or relative permittivity, is the ratio of the permittivity of a material to the permittivity of ______.

    <p>free space</p> Signup and view all the answers

    What is the unit of measurement for dielectric strength?

    <p>Volts per meter (V/m)</p> Signup and view all the answers

    Match the following terms with their corresponding descriptions:

    <p>Capacitance = The ability of a capacitor to store electric charge Dielectric Constant = The ratio of the permittivity of a material to the permittivity of free space Dielectric Strength = The maximum electric field a dielectric can withstand before breakdown Energy Density = The amount of energy stored per unit volume in an electric field</p> Signup and view all the answers

    Which of the following is NOT a typical application of capacitors in electronic circuits?

    <p>Amplifying signals</p> Signup and view all the answers

    Dielectric materials always have a dielectric strength that is higher than that of free space.

    <p>True</p> Signup and view all the answers

    The energy stored in a capacitor can be considered to be stored in the ______ between the plates.

    <p>electric field</p> Signup and view all the answers

    Which material allows free movement of electrons, enabling electric current?

    <p>Conductor</p> Signup and view all the answers

    Insulators allow electrons to move freely under an applied potential difference.

    <p>False</p> Signup and view all the answers

    What is the SI unit of charge?

    <p>coulomb</p> Signup and view all the answers

    The electrical force between two charged particles is described by __________'s Law.

    <p>Coulomb</p> Signup and view all the answers

    What type of conduction occurs in conductors?

    <p>Electronic conduction</p> Signup and view all the answers

    The force between two like charges is attractive according to Coulomb's Law.

    <p>False</p> Signup and view all the answers

    What is the value of the Coulomb constant, ke?

    <p>8.9875 x 10^9 N.m^2/C^2</p> Signup and view all the answers

    In semiconductors, electrons are not tightly bound to the nucleus, allowing __________ of conduction.

    <p>some degree</p> Signup and view all the answers

    Match the types of materials with their characteristics:

    <p>Insulators = Tightly bound electrons Semiconductors = Partially bound electrons Conductors = Loosely bound electrons</p> Signup and view all the answers

    What is electric potential defined as?

    <p>Potential energy per unit charge</p> Signup and view all the answers

    What is the symbol for power in electrical equations?

    <p>P</p> Signup and view all the answers

    A capacitor is used primarily for storing electrical energy.

    <p>True</p> Signup and view all the answers

    What unit is resistance measured in?

    <p>ohms</p> Signup and view all the answers

    The equation relating resistance, resistivity, length, and cross-sectional area is R = ______.

    <p>ρl/A</p> Signup and view all the answers

    Match the following components with their functions:

    <p>Resistor = Limits current flow Capacitor = Stores electrical energy Inductor = Stores energy in a magnetic field Variable Resistor = Adjusts resistance value</p> Signup and view all the answers

    Which of the following factors does NOT affect the resistance of a material?

    <p>Color of the wires</p> Signup and view all the answers

    Fixed resistors have varying resistance values.

    <p>False</p> Signup and view all the answers

    What does the third colored band on a resistor indicate?

    <p>multiplier</p> Signup and view all the answers

    Capacitance is a measure of how much charge a capacitor can ______.

    <p>hold</p> Signup and view all the answers

    Which application does NOT commonly use capacitors?

    <p>Limiting current flow</p> Signup and view all the answers

    What is the SI unit of electric potential?

    <p>Volt</p> Signup and view all the answers

    Electric potential can only be positive.

    <p>False</p> Signup and view all the answers

    What is the work done when moving a unit charge in an electric field measured by?

    <p>Electric potential difference</p> Signup and view all the answers

    A positively charged particle produces a __________ electric potential.

    <p>positive</p> Signup and view all the answers

    How is the electric potential difference ( abla V) defined between two points?

    <p>As the difference in work done per unit charge</p> Signup and view all the answers

    The electric field is a measure of the rate of change of electric potential with respect to distance.

    <p>True</p> Signup and view all the answers

    What is the relationship between charge (Q), current (I), and time (t)?

    <p>Q = It</p> Signup and view all the answers

    The energy gained by an electron when accelerated through a potential difference of one volt is called __________.

    <p>Electronvolt</p> Signup and view all the answers

    What occurs when moving electrons collide with atoms in a metal?

    <p>Increase in atom vibrations</p> Signup and view all the answers

    The capacitance of a parallel plate capacitor increases as the distance between the plates increases.

    <p>False</p> Signup and view all the answers

    What is the formula for capacitance (C) of a parallel plate capacitor?

    <p>C = ε0 A / d</p> Signup and view all the answers

    For three capacitors in ______, the equivalent capacitance is the sum of their capacitances.

    <p>parallel</p> Signup and view all the answers

    Which of the following is a practical unit of capacitance?

    <p>Picofarad</p> Signup and view all the answers

    An isolated sphere's capacitance depends on its charge.

    <p>False</p> Signup and view all the answers

    What effect does inserting a dielectric material have on the potential difference between capacitor plates?

    <p>It decreases the potential difference.</p> Signup and view all the answers

    The formula for the energy stored in a capacitor is ______.

    <p>U = Q^2 / 2C</p> Signup and view all the answers

    What happens to capacitance if the plate area increases?

    <p>Capacitance increases</p> Signup and view all the answers

    The electric field between the plates of a parallel capacitor depends on the charge and the area of the plates.

    <p>True</p> Signup and view all the answers

    What is the formula for equivalent capacitance of three capacitors in series?

    <p>1 / Ceq = 1 / C1 + 1 / C2 + 1 / C3</p> Signup and view all the answers

    The increase of charge stored in a capacitor when a dielectric is inserted is quantified by a factor called ______.

    <p>dielectric constant</p> Signup and view all the answers

    Study Notes

    Course Information

    • Course Name: CSM 153 Circuit Theory
    • Instructor: Akwasi Acheampong Aning
    • Institution: Kwame Nkrumah University of Science & Technology (KNUST), Ghana
    • Date: January 24, 20123

    Course Outline

    • Unit 1: Basic Concepts and Elements
    • Charge and Matter
    • Force, Energy and Power
    • Resistors, Capacitors, and Inductors
    • Unit 2: Direct Circuit Analysis
    • Ohm's Law
    • Series Circuit
    • Parallel Circuit
    • Methods of Analysis
    • Unit 3: Network Theorems
    • Superposition Theorem
    • Thevenin's Theorem
    • Norton's Theorem
    • Delta and Wye Networks
    • Unit 4: Magnetism
    • Field and Force
    • Electromagnetics
    • Ampere's Law
    • Biot-Savart Law
    • Unit 5: AC Circuits
    • Alternating Currents and Voltages
    • R, L, and C Elements
    • Power in AC Circuits

    Assessment

    • Exam: 70%
    • Quizzes, homeworks, attendance, and mid-semester exam: 30%
    • Giancoli, D. C. Physics: Principles with Applications 7th Edition. (2014)
    • Randall D. Knight, Physics for Scientists and Engineers a Strategic Approach with Modern Physics 4/e. (2017)
    • Raymond A. Serway and John W. Jewett Jr., Physics for Scientists and Engineers with Modern Physics, 10th Edition. (2019)
    • Allan H. Robbins and Wilhelm C. Miller, Circuit Analysis: Theory and Practice, Fifth Edition. (2013)
    • William H. Hayt, Jr., Jack E. Kemmerly and Steven M. Durbin Engineering Circuit Analysis, 8th Edition. (2012)
    • John Bird, Electrical Circuit Theory and Technology Sixth edition. (2017)
    • Any University Physics Book

    Course Objectives

    • Introduce electric circuits and their analysis.
    • Im part knowledge on solving circuit equations using network theorems.
    • Develop a clear understanding of parameters of a magnetic circuit.
    • Introduce the phenomenon of resonance in coupled circuits.

    Learning Outcomes

    • Understand basic electrical properties.
    • Use node and mesh analysis methods for linear circuits.
    • Analyze circuits using superposition, Thevenin's, and Norton's theorems.
    • Understand basic magnetic properties.

    COVID-19 Awareness

    • COVID-19 is caused by SARS-CoV-2 and spreads easily.
    • Signs and symptoms: fever, chills, cough, difficulty breathing, headache, diarrhea, loss of taste/smell.
    • Transmission: respiratory droplets, airborne, contaminated surfaces.
    • Prevention: adhere to KNUST COVID-19 safety protocols, respiratory hygiene, hand hygiene, maintain safe physical distancing, avoid crowds.

    Circuit Components

    • Diagrams of various circuit components (batteries, cells, switches, resistors, capacitors, inductors, wires, etc.) are shown with their corresponding circuit symbols. These components are fundamental in circuit theory.

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    Related Documents

    CSM 153 Circuit Theory Past Paper PDF

    Description

    Test your understanding of the fundamental concepts in Circuit Theory covered in the CSM 153 course. This quiz includes topics such as Ohm's Law, network theorems, and AC circuits, providing a comprehensive assessment of key principles and applications. Prepare to dive into the intricacies of electrical circuits and their functionalities.

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