Electricity Review Alex PDF

True - Electricity is the flow of electrons in a closed circuit.\ True - Current electricity involves the flow of electrons through a conductor.\ False - ACSR is Aluminum Cable Steel Reinforced.\ True - Franklin discovered that lightning and static electricity were the same phenomenon.\ True - Elect...

True - Electricity is the flow of electrons in a closed circuit.\ True - Current electricity involves the flow of electrons through a conductor.\ False - ACSR is Aluminum Cable Steel Reinforced.\ True - Franklin discovered that lightning and static electricity were the same phenomenon.\ True - Electricity produced from magnetism requires the movement of a coil and a magnet.\ False - Protons carry a negative charge and are located in the nucleus of an atom.\ True - Matter is composed of atoms, and atoms consist of electrons, protons, and neutrons.\ False - Insulators are materials that allow electric charges to move freely.\ False - The resistance of a material decreases as its temperature increases.\ True - Electrons are lighter than protons and carry a negative charge.\ False - In an open circuit, current can still flow between two disconnected terminals.\ True - Georg Ohm is known for formulating the law that relates current, voltage, and resistance.\ False - A short circuit occurs when the resistance between two terminals is infinitely high.\ False - Direct current (DC) changes direction periodically, while alternating current (AC) flows in one direction only.\ True - Electrons in the outermost shell of an atom are known as valence electrons.\ True - Silver is a better conductor of electricity than copper.\ False - The unit of resistance is the ampere.\ True - In a conventional current flow, current moves from the positive terminal to the negative.\ False - Electric current is the flow of protons through a conductor.\ True - The SI unit for voltage is the volt. Problem Solving and Identification:\ Static and current electricity - What are the two main types of electricity?\ William gilbert - Who is considered the Father of Electricity?\ Thermoelectricity - What type of electricity is generated by heating the junction of a thermocouple?\ wood - Which of the following is a poor conductor of electricity?\ Michael Faraday - Who demonstrated that electricity could be generated through magnetism using motion?\ Ampere (A) - What is the SI unit of electric current?\ Atoms- The atomic number of an element represents the number of which particle?\ Glass - Which of the following materials is a good insulator?\ V=IRV = IR - What does Ohm\'s law state?\ Variable resistor - Which type of resistor allows its value to be changed?\ 1 kΩ\\Omega - A resistor\'s color code of brown-black-red-gold gives a resistance of:\ Limits current flow - What is the primary function of a resistor in a circuit?\ James Watt - Who is credited with the invention of the steam engine, which enabled large-scale electricity generation?\ 2 V - What is the potential difference across a battery that does 10 J of work to move 5 C of charge?\ Resistance-length law - Which law states that the resistance varies directly with the length of the conductor?\ 0.156 Ω0.156 \\, \\Omega - What is the resistance of a wire 2 km long and 22 sq. mm in cross-sectional area with a resistivity of 1.72×10−6 Ω cm1.72 \\times 10\^{-6} \\, \\Omega \\, \\text{cm}?\ Resistivity - Which property of a material increases with a rise in temperature?\ Heat production - Which of the following is NOT an effect of electric current?\ 3000 C - What is the total charge transferred by a current of 10 A flowing for 5 minutes?\ 43.3 Ω43.3 \\, \\Omega - What is the resistance of a copper wire at 20°C with a temperature coefficient of 0.00393/°C0.00393/\\text{°C}, if its resistance at 120°C is 50 Ω\\Omega?\ Motion, chemical reaction, heat - Which of the following methods can produce electricity?\ Flow of electrons - What is electricity primarily about?