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A series of questions and answers related to basic electrical concepts, covering topics such as direct current (dc), alternating current (ac), voltage, current, resistance, power, and circuit types. It also includes practical examples and applications of these concepts, making it a valuable resource for students learning about basic electrical principles.
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MAA Basic Electrical 101 ( Companion to MAA's Basic Electrical 101) Questions With Complete Solutions Alternating Current - AC Direct Current - DC Volts - Electromotive Force is measured in _________________. Amps - Current is measured in _______________________. Ohms - Resistance is measured in ____________________. Watts - Power is measured in ________________________. Direct Current - ______________________ electricity flows in only one direction. Circuit - A path that an electric current travels to and from a source and a load Battery - A _____________ is a common source of DC current. AC or Alternating - _____________ current flows alternately in one direction and then the other. 120 VAC (Volts Alternating Current) - A standard household wall outlet has a voltage supply of __________ volts. 18.5Ω - Find the resistance. 13 Volts, 0.7 Amps
71.4 - Find the voltage. Resistance is 17Ω and current is 4.2. 14.85A - Find the current. 208 Volts, 14Ω Parallel - What type of circuit is this? It went down. - My amperage went up. What happened to my resistance? 10 gauge - 12 gauge wire and 10 gauge wire. Which wire is thicker? 14 gauge - You are wiring a new circuit that connects to a 15 amp breaker. What size of wire do you need? 12 gauge wire - You are pulling a new circuit that connects to a 20 amp breaker. What size of wire do you need? Bad - A switch reads resistance of 0 ohms while in the OFF position. Is the switch good or bad? Bad - A wire reads resistance of "OL". Is the wire good or bad? Off - Before testing resistance of a component, make sure the voltage is turned _______________. isolated - Before checking continuity on a component, make sure the component is ___________________ from the rest of the circuit.
Open circuit - an incomplete electrical circuit in which no current flows Closed circuit - a complete circuit through which electricity flows GFCI - Ground Fault Circuit Interrupter AFCI - Arc Fault Circuit Interrupter Circuit breaker - a switch that opens when the current in a circuit is too high Fuse - A safety device with a thin metal strip that will melt if too much current passes through a circuit Gang - Term meaning the number of devices in a box Decora - The rectangle shaped opening for devices (like a GFCI outlet) Dimmer - an electrical device that controls the intensity of a light source connected to it Photocell - A switch that turns off a lighting circuit during daylight hours Three way switch - Turning power on and off from two locations
Traveler wires - two wires that switch power back and forth between two 3-way switches TR Outlets - have plastic shields in the plug holes preventing anything other than a plug from being inserted WR outlets - rated for wet or damp locations Lumens - Measure of a bulb's brightness Kelvin - Measure of a bulb's "temperature" or color 2700K - warm white bulb color, similar to typical incandescent lighting 5000k - daylight bulb color Ampacity - The maximum current, in amps, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating. Series Circuit - A circuit with each point connected end to end to provide a single path of current. parallel circuit - A circuit that contains more than one branch for current flow. Increase - Adding branches in a parallel circuit will cause amperage to _________ Increase - Adding loads in series will cause resistance to