Basic Circuit Diagrams Quiz

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Questions and Answers

In a circuit diagram, symbols represent electronic components.

True (A)

What does SPST stand for?

  • Single-pole single-throw (correct)
  • Standard-pole switch technology
  • Single-pole double-throw
  • Simple-pole switching terminal

The longer line in a voltage source symbol indicates the ______ terminal.

positive

What is the purpose of a circuit diagram?

<p>A circuit diagram provides a visual representation of how electronic components are connected in a circuit.</p> Signup and view all the answers

Match the following circuit symbols with their corresponding components:

<p>(<em>) = Voltage source/voltage supply (<strong>) = SPST switch (</strong></em>) = SPDT switch = Conductor/cable = Lamp</p> Signup and view all the answers

Which of the following components has a voltage-independent resistance?

<p>Ohmic resistor (A)</p> Signup and view all the answers

The relationship between voltage and current is called a characteristic curve.

<p>True (A)</p> Signup and view all the answers

What is the abbreviation for a resistor with a lower resistance at higher temperatures?

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

The formula for calculating resistance is ______ = Voltage / Current

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

Match the following components with their corresponding characteristics:

<p>Diode = Allows current flow in one direction only NTC-resistor = Resistance decreases with increasing temperature Ohmic resistor = Constant resistance regardless of voltage PTC-resistor = Resistance increases with increasing temperature Varistor = Resistance changes with voltage</p> Signup and view all the answers

The SI unit for electric current is the Coulomb.

<p>False (B)</p> Signup and view all the answers

The electric current is defined as the amount of charge flowing through a conductor in a given ______.

<p>time interval</p> Signup and view all the answers

What is the physical direction of current flow for a negative charge?

<p>From the negative pole to the positive pole.</p> Signup and view all the answers

Which of the following statements is TRUE regarding the conventional current direction?

<p>It is always from positive to negative. (A)</p> Signup and view all the answers

Match the following terms with their corresponding units:

<p>Electric current = Ampere (A) Charge = Coulomb (C) Time = Second (s)</p> Signup and view all the answers

The physical current direction is always the same as the technical current direction.

<p>False (B)</p> Signup and view all the answers

Explain why it's important to define a conventional current direction.

<p>Defining a conventional current direction simplifies analysis of circuits, as we don't always need to consider the sign of the charge carriers.</p> Signup and view all the answers

An ohmic resistor has a resistance that is ______ for varying the applied voltage.

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

A nonohmic resistor has a resistance that does not change when the applied voltage changes.

<p>False (B)</p> Signup and view all the answers

If you increase the time it takes for a certain amount of charge to flow through a conductor, what happens to the current?

<p>It decreases. (A)</p> Signup and view all the answers

In a typical metallic conductor, the charge carriers responsible for electric current are ______.

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

Which of the following is NOT a method for generating different voltages in a circuit?

<p>Using a capacitor (B)</p> Signup and view all the answers

What are the two main types of components that can convert electrical energy into other forms of energy?

<p>Consumers and actuators</p> Signup and view all the answers

Match the following terms with their definitions:

<p>Ohmic resistor = A resistor whose resistance remains constant with varying voltage Nonohmic resistor = A resistor whose resistance changes with varying voltage Voltage divider = A circuit that divides a voltage into smaller components Consumer = A device that converts electrical energy into another form of energy Actuator = A device that uses electrical energy to perform mechanical work</p> Signup and view all the answers

A light bulb is an example of an ohmic resistor.

<p>False (B)</p> Signup and view all the answers

What is the relationship between resistance and current in an ohmic resistor?

<p>Resistance and current are directly proportional.</p> Signup and view all the answers

What type of energy conversion occurs when an electric motor is operating?

<p>Electrical energy to mechanical energy (D)</p> Signup and view all the answers

The ______ is a measure of how much electrical energy is converted into another form of energy per unit of time.

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

A battery rated at 15 Ah can deliver a current of 3 A for 5 hours.

<p>True (A)</p> Signup and view all the answers

What is the unit of measurement for power in electrical circuits?

<p>Watts (W)</p> Signup and view all the answers

A home electrical socket typically has three holes, which are used for ______, ______, and ______.

<p>live wire, neutral wire, earth wire</p> Signup and view all the answers

Match the following electrical quantities with their respective units of measurement:

<p>Current = Ampere (A) Voltage = Volt (V) Resistance = Ohm (Ω) Power = Watt (W)</p> Signup and view all the answers

Which of the following is NOT a safety measure used in home electrical installations?

<p>Using metal objects to test for electricity (A)</p> Signup and view all the answers

Flashcards

Circuit Symbols

Standardized symbols for electronic components in a circuit diagram.

Circuit Diagram

A graphical representation of an electrical circuit.

Voltage Source

Component providing electrical energy in a circuit.

Electric Current

The flow of electrical charges through a conductor.

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SPST Switch

Single-Pole Single-Throw switch, used to open or close a circuit.

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SPDT Switch

Single-Pole Double-Throw switch, can connect to one of two circuits.

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Closed Circuit

An electrical circuit where the path is complete, allowing current to flow.

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Ampere-hour (Ah)

A unit of electric charge representing current flow for one hour.

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Energy stored in battery

The total energy in a battery, calculated in kWh.

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Electricity cost

The cost of electricity given the amount consumed in kWh and its price.

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Home electricity current type

The type of current commonly used in homes, typically alternating current (AC).

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Speaker system overload protection

The measure to prevent excessive current flow in audio systems which could damage components.

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Electric current (I)

The flow of charges ΔQ through a conductor in time Δt, I = ΔQ/Δt.

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SI unit of current

The SI unit for electric current is the Ampere (A).

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Charge types

Electric current consists of free-moving charges, which can be positive or negative.

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Physical current direction

The actual direction of charge movement; positive charges move from positive to negative.

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Technical current direction

Defined direction of current flow, always from positive to negative, like the electric field lines.

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Effect of increased charge on current

Increasing charge flow through a conductor in the same time increases the current.

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Effect of decreased time on current

If the same charges flow through a conductor in a shorter time, the current increases.

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Decrease in current effect

If the current is decreased, the time until a certain amount of charges flows increases.

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Charging current calculation

Current can be calculated by I = ΔQ/Δt; for example, 6 μC in 3 s gives I = 2 μA.

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Voltage Divider

A circuit that divides input voltage into smaller output voltages based on a ratio.

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Ohmic Resistor

A resistor with constant resistance regardless of voltage or current changes.

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Nonohmic Resistor

A resistor whose resistance changes with applied voltage or current.

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Resistance Measurement

The process of quantifying the resistance of a component by applying different voltages.

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Electrical Energy Conversion

The transformation of electrical energy into other forms like heat or motion.

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Ohm's Law

A fundamental equation that relates voltage, current, and resistance (V=IR).

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Characteristic Curves

Graphs that represent the behavior of a component under different voltage and current conditions.

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Resistor Identification

Determining whether a component behaves like an ohmic or nonohmic resistor based on experiments.

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Electrical Motor

A device that converts electrical energy into mechanical energy.

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LED

A diode that emits light when current flows through.

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NTC Resistor

A resistor with lower resistance at higher temperatures.

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PTC Resistor

A resistor with higher resistance at higher temperatures.

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Varistor

A voltage-dependent resistor that protects circuits from voltage spikes.

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I-U Diagram

Graph that plots current (I) against voltage (U) for a component.

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R-U Diagram

Graph that plots resistance (R) against voltage (U) for a component.

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Voltage-Current Pair

Specific values of voltage (V) and corresponding current (I) for a circuit.

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Study Notes

Electric Circuit Study Notes

  • This document is a set of study notes on electric circuits, specifically covering concepts, exercises, and labs.
  • The document spans multiple pages.
  • The document covers topics like simple electric circuits, current, voltage, resistance.
  • It delves into the concepts of circuit diagrams, various circuit components (like switches, resistors, and bulbs), series and parallel circuits, measurement of electrical quantities (using a multimeter), and practical applications such as home electricity and safety.
  • The exercises and labs are designed to reinforce theoretical concepts with hands-on applications.
  • The document includes several exercises and examples related to circuit design, analysis, and measurement.
  • It includes a section on voltage sources, resistors in series/parallel, and measurement using a multimeter, encompassing voltage, current, and resistance.
  • It contains sections on EveryCircuit, a circuit analysis tool, explaining its use in circuit design and analysis.
  • It guides on building different types of circuits, including those with bulbs, switches, and various resistor combinations (series and parallel) and includes exercises to test understanding.
  • A section on safety measures is present, discussing the importance of protecting oneself from electrical shocks, and common safety procedures in electrical setups.
  • The study notes also include definitions of terms like electric current, voltage, and resistance, as well as examples of how to apply these concepts.
  • The document contains diagrams, illustrations, and tables to aid understanding.
  • The document emphasizes practical applications like installing a bulb in a socket and safety procedures.
  • The document offers a set of exercises for students to practice.

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