Physics Chapter on Matter and Atoms
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Questions and Answers

What is the minimum diode Peak Inverse Voltage (PIV) required for a Full wave rectifier output of 5V?

  • 10V (correct)
  • 20V
  • 5V
  • none of the above

    • In which class must the Push-Pull circuit be used?

  • Class C
  • Class B (correct)
  • Class A
  • Class AB

    • What type of gates can be constructed using a single gate?

  • Basic gates
  • Universal gates (correct)
  • Logic gates
  • Exclusive gates

    • When will the output of an OR gate be LOW?

    <p>When all inputs are LOW</p> Signup and view all the answers

    If an OR gate has inputs A and B, what is the logical expression for the output Y?

    <p>A+B</p> Signup and view all the answers

    For an OR gate with inputs A=1, B=1, C=0, what will the output be?

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

    When will the output of an OR gate with inputs A=0, B=0, C=1 be?

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

    The localizer helps the airplane to pass through which part of the runway?

    <p>Centre line</p> Signup and view all the answers

    Matter is a substance which ____________.

    <p>occupies space, has mass</p> Signup and view all the answers

    Matter is made of the smallest particle called ____________.

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

    Molecules are made of the smallest particle called ____________.

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

    The nucleus consists of ____________ and neutrons.

    <p>protons and neutrons</p> Signup and view all the answers

    Electrons revolve around the ____________.

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

    Neutrons are ____________ charged.

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

    Electrons revolve around the nucleus in different ____________.

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

    The electrons in the outermost orbit are called ____________.

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

    The output stage of a multistage amplifier is also called ____________.

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

    A class A power amplifier uses ____________.

    <p>one transistor</p> Signup and view all the answers

    The maximum efficiency of a class C amplifier is ____________.

    <p>78.50%</p> Signup and view all the answers

    In class A operation, the operating point is generally located ____________ of the d.c. load line.

    <p>at the middle</p> Signup and view all the answers

    IC stands for __________.

    <p>Integrated Circuit</p> Signup and view all the answers

    RTL, DTL, and TTL are types of __________.

    <p>Logic family</p> Signup and view all the answers

    Which family of logic circuits uses FETs?

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

    Stereophony means ____________.

    <p>Three dimensional sound</p> Signup and view all the answers

    In a __________ system, one amplifier is used to combine all signals from different microphones.

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

    The advantage of a surround sound system is to keep the __________ within a reasonable limit.

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

    The driver amplifier in the PAS is used to __________ power.

    <p>Drive the Power Amplifier</p> Signup and view all the answers

    The outermost orbit in an atom is called __________.

    <p>Valence Orbit</p> Signup and view all the answers

    Each electron has a charge equal to __________ Coulombs.

    <p>1.602 X 10-19 Coulomb</p> Signup and view all the answers

    The maximum number of electrons in an orbit is given by the relation __________.

    <p>2n^2</p> Signup and view all the answers

    The atomic number of silicon is __________.

    <p>14</p> Signup and view all the answers

    A 2-transistor class B power amplifier is commonly called __________ amplifier.

    <p>Push-pull</p> Signup and view all the answers

    If a transistor is operated in such a way that output current flows for 50% of the input signal, then it is __________ operation.

    <p>Class B</p> Signup and view all the answers

    DC forward voltage is needed to emit light in the case of __________.

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

    What type of logic gate is represented by the term 'EX-OR'?

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

    Which of the following is NOT a requirement of a PA system?

    <p>Audio distortion</p> Signup and view all the answers

    What does ILS stand for in aviation terminology?

    <p>Instrument Landing System</p> Signup and view all the answers

    What is indicated by an atomic number of 32?

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

    If an atom has 14 protons and 14 neutrons, what is its atomic mass?

    <p>32</p> Signup and view all the answers

    What type of charge does an atom gain if it has more electrons than protons?

    <p>Negative charge</p> Signup and view all the answers

    The size of a power transistor is primarily made large for which reason?

    <p>Dissipate heat</p> Signup and view all the answers

    If the power rating of a transistor is 1W with a collector current of 100mA, what is the maximum allowable collector voltage?

    <p>10V</p> Signup and view all the answers

    What is the conduction angle of a Class B amplifier?

    <p>180 degrees</p> Signup and view all the answers

    What is the collector efficiency if a power amplifier has an input of 5 watts and an AC power output of 2 watts?

    <p>40%</p> Signup and view all the answers

    When an atom loses an electron, what charge does it acquire?

    <p>Positive charge</p> Signup and view all the answers

    What happens to the body when electrons are added or removed?

    <p>It becomes positively charged</p> Signup and view all the answers

    What type of carrier donates electrons in semiconductor physics?

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

    What is the total power output if the output signal voltage is 5 V and current is 200 mA (r.m.s)?

    <p>2W</p> Signup and view all the answers

    If an atom is neutrally charged when it has equal numbers of protons and electrons, what happens if it loses a proton?

    <p>It becomes positively charged</p> Signup and view all the answers

    What frequency range does the Glide Slope transmitter operate within?

    <p>88 MHz - 108 MHz</p> Signup and view all the answers

    What ensures an aircraft lands on the correct angle of descent?

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

    In ILS system, the glide path equipment operates in which frequency range?

    <p>339.3 KHz - 335 KHz</p> Signup and view all the answers

    The imaginary lines of force in an electrostatic field are called what?

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

    According to Coulomb's first law, like charges behave how in relation to one another?

    <p>Repel, attract</p> Signup and view all the answers

    Coulomb's second law states that the force of attraction or repulsion is directly proportional to what?

    <p>Product of the two charges</p> Signup and view all the answers

    The formula for the force of attraction or repulsion according to Coulomb's law is what?

    <p>F = k (q1q2/d2)</p> Signup and view all the answers

    If the distance between two charges increases, what happens to the force?

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

    The difference in electric pressure between two charges is referred to as what?

    <p>Potential difference</p> Signup and view all the answers

    What is the unit of potential difference?

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

    What is the force that moves electrons in a conductor known as?

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

    According to Ohm's law, the current through a conductor is directly proportional to which of the following?

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

    In a circuit, what types of transformers are used in a center-tapped setup?

    <p>Centre tapped rectifier</p> Signup and view all the answers

    Which type of coupling in amplifiers provides the highest gain?

    <p>Transformer coupled</p> Signup and view all the answers

    In a step-up transformer, what is the relationship between N1 and N2?

    <p>N1 &gt; N2</p> Signup and view all the answers

    Study Notes

    EM Question Bank - Study Notes

    • Matter: A substance that occupies space and has mass.
      • Smallest particle of matter: Molecules
      • Molecules are made of atoms.
      • Atoms contain a nucleus (protons & neutrons) and electrons orbiting the nucleus.
    • Nucleus: Contains protons (positive charge) and neutrons (neutral charge).
    • Electrons: Orbit the nucleus in different energy levels (orbits). Outermost orbit electrons are valence electrons.
    • Neutron: Neutrally charged particle.
    • Electron Charge: 1.602 x 10-19 Coulombs.
    • Maximum Orbit Electrons: 2n2 (where n is the orbit number).
    • Atomic Number: Number of protons in an atom. The protons and electrons are present in equal numbers in the atom.
    • Atomic Mass: Total protons and neutrons in an atom.
    • Class A Amplifier: Operates over the entire input cycle
    • Class B Amplifier: Operates for half the input cycle
    • Class C Amplifier: Operates for a very small fraction of the input cycle
    • IC: Integrated Circuit
    • Logic Families: RTL, DTL, TTL, and CMOS.
    • Stereophony: A two-channel audio system
    • Surround Sound: A three-dimensional sound system.
    • Public Address System (PAS): System for amplifying sound
    • Mixer: Electronic device combining different audio signals.
    • Driver Amplifier: In PAS, it amplifies the input signal for power amplification to drive a load
    • Transformer Coupling: A coupling method using a transformer for impedance matching.
    • R.F. Amplifiers: Amplifiers used for radio frequencies.
    • Audio Frequency (AF) Amplifiers: Amplifiers used for audio frequencies.
    • Digital Signals: Electronic signals having specific values.
    • Logic gates: Basic building blocks of digital circuits (AND, OR, NOT, NAND, NOR, XOR, XNOR)
    • Instruction Landing System (ILS): System guiding air craft during landing.
    • Visibility: The clarity of the visual area used by aircraft during landing
    • Radio frequency: Electronic signal which transmits information over distance

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    Description

    This quiz focuses on key concepts related to matter, atoms, and their structure. It covers topics such as atomic mass, atomic number, and the properties of electrons and nuclei. Enhance your understanding of these fundamental principles in physics.

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