Basic Electronic Parameters and Components

False (B)

The current stops flowing.

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

<p>Direct Current (D.C.) = Current that flows continuously in one direction Alternating Current (A.C.) = Current that changes direction periodically Capacitor = Device that stores electrical energy Resistance = Opposition to the flow of electric current</p> Signup and view all the answers

<p>Collapsing magnetic field in an inductor (D)</p> Signup and view all the answers

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

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

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

<p>Non-electrolytic capacitors (A)</p> Signup and view all the answers

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

<p>The current flows rapidly at first, then more slowly.</p> Signup and view all the answers

<p>Electrolytic = Stores more charge, has polarity Non-electrolytic = Stores less charge, no polarity</p> Signup and view all the answers

<p>The multiplier (C)</p> Signup and view all the answers

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

<p>I = V / R</p> Signup and view all the answers

<p>short circuit</p> Signup and view all the answers

<p>Red = 2 Green = 5 Brown = 1 Orange = 3</p> Signup and view all the answers

<p>Red (D)</p> Signup and view all the answers

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

<p>The resistance between the leads</p> Signup and view all the answers

<p>Sum of individual resistances (B)</p> Signup and view all the answers

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

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

<p>R1 + R2</p> Signup and view all the answers

<p>It uses magnetic fields to operate (C)</p> Signup and view all the answers

<p>Volts (D)</p> Signup and view all the answers

<p>Inductive load = Uses magnetic fields, e.g., motors Resistive load = Converts electrical energy to heat, e.g., heater Capacitive load = Stores electrical energy in an electric field Magnetic load = Uses magnetic fields, e.g., relays</p> Signup and view all the answers

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

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

<p>Watts = Volts * Amps</p> Signup and view all the answers

<p>Primary and secondary coils</p> Signup and view all the answers

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

<p>The resistance can vary from 90 ohms to 110 ohms. (B)</p> Signup and view all the answers

<p>To limit the current flowing through the LED.</p> Signup and view all the answers

<p>A minimum voltage reference level not connected to earth. (A)</p> Signup and view all the answers

<p>Voltage = Difference in charge measured in volts Current = Flow of electrons through a conductor Power = Work done by circuit measured in watts Resistance = Opposition to current measured in ohms</p> Signup and view all the answers

The difference in charge between two points, measured in Volts.

The flow of electrons through a conductor or semiconductor, measured in Amperes or Amps.

Materials that conduct electricity well, allowing electrons to flow easily.

Materials that have a limited ability to conduct electricity, like silicon in transistors.

Materials that resist the flow of electricity, preventing electrons from moving easily.

The minimum voltage reference level in a circuit, often connected to the Earth.

The opposition to the flow of current, measured in Ohms.

A component in a circuit that limits the flow of current and causes voltage drops across it, often measured in Ohms.

The first two bands represent the first two digits of the resistance value, while the third band acts as a multiplier, indicating the number of zeroes to add after the first two digits.

The fourth band represents the tolerance, which indicates the accuracy of the resistor. It shows the percentage of variation from the stated resistance value.

A potentiometer is a variable resistor, where the resistance can be adjusted by moving a wiper between two leads. The resistance between the wiper and either lead determines the overall resistance.

In linear potentiometers, the resistance changes proportionally to the knob's rotation. In logarithmic potentiometers, the resistance changes exponentially with the knob's rotation, giving a more gradual change.

Ohm's Law states the relationship between voltage, current, and resistance in a circuit. Voltage is equal to current multiplied by resistance, or V = I * R.

A working circuit requires a closed loop for current flow. The total current entering a junction must equal the total current leaving that junction.

An open circuit is a break in the circuit path, preventing current flow. A short circuit occurs when there is insufficient resistance in the load, causing excessive current.

Kirchoff's current law states that the total current entering a junction in a circuit must equal the total current leaving the junction.

A circuit where all components are connected end-to-end, forming a single path for electron flow. All components share the same current, and the total resistance is the sum of individual resistances.

A circuit where components are connected in parallel, sharing the same voltage. Each component has its own path, and the total current is the sum of currents in each branch.

A mechanical device that interrupts current flow. It is characterized by the number of poles and throws.

A method to calculate the voltage drop across a resistor in a series circuit. It uses the input voltage and the resistances of the two resistors.

A type of electrical current that changes direction periodically. It is represented by a sinusoidal wave and is measured in root mean square (RMS) voltage.

A passive electrical component that stores energy in a magnetic field. It is commonly used as an AC filter. Its value is measured in Henry.

A device that transfers electrical energy between circuits through electromagnetic induction. It consists of two coils, primary and secondary, sharing a common iron core.

A type of switch controlled by an electromagnet. It is operated by an electrically isolated signal from the switched current. It is slow, noisy, and can pass AC or DC current.

The flow of electrons ceases when the capacitor is fully charged because the electrical potential difference between the plates matches the voltage of the source.

A capacitor opposes the flow of direct current (DC) because it acts like an open circuit once fully charged. No continuous current can flow through a capacitor.

Alternating current (AC) can flow through a capacitor because it continuously charges and discharges the capacitor, creating a continuous flow of current.

The rate at which a capacitor charges or discharges is determined by the resistance in the circuit. Higher resistance slows down the process.

Shorting a capacitor causes a rapid discharge, often with a spark if it's a large capacitor. This happens because there's no resistance to hinder the flow of charge.

A sudden surge of voltage in an inductor, often caused by the collapsing magnetic field within the inductor.

A component used to protect circuits from blowback voltage by allowing current to flow in one direction only.

The property of a capacitor that indicates how much charge it can store. Measured in Farads.

A material that increases the capacitance of a capacitor by allowing more charge to be stored on the plates. Examples include ceramic, paper, and mica.

Capacitors that have a solid dielectric material. These are typically smaller and have a longer lifespan than electrolytic capacitors.

Capacitors that use a liquid or paste dielectric material, allowing them to store more charge but also making them more prone to leakage and needing to be connected with the correct polarity.

The process of a capacitor accumulating charge when connected to a source of electricity. The current flow is initially fast, then gradually decreases as it reaches maximum charge.

The flow of electrons from a charged capacitor to a circuit, effectively releasing the stored charge. This process occurs in the opposite direction of charging.