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Exam 1(ch 1 - 6)
Study cards
| Term | Definition |
|---|---|
| Symbol for resitance | R |
| Unit of measurment for resistance | Ohm |
| Advantage of engineering notation over scientifc notation | Engineering notation symplifies conversions to metric prefixes |
| Unit of measurment for current | I |
| not a typical electrical compnent | magnatron |
| Siemens is a unit of | conductance |
| an oscililliscope os pirmarly used to measure | ac voltage |
| the capacity of a battery or cell is measure in | ampere-hours |
| typical resistor used for high power applications | wire wound |
| DMMs are most widely used electronic measuring insturment because | Greater realiability, greater ease of reading, greater acuracy, greater number of provided functions, (all of the above). |
| current equals | coulombs/time |
| which of the following are not needed to form a electric current ( load, voltage source, conductive path of current, switch) | switch |
| voltage can be produced by the means of | chemcial energy, magnetic energy combined with mechanical motion, light energy ( all of the above) |
| materials with the fewest free electrons | insulators |
| thermocouple is formed by the junction of | two disimilar metals |
| which metal is used most for conductors in electronic applications | copper |
| the operation of a solar cell is based on the what effect | photovoltaic effect |
| referance ground potential wirh respect to other points in the circuit | 0 V |
| the free flow of electrons in a conductive material | current |
| how is a negative ion produced | the atom gians an electron in the valence shell |
| fith band in a precision reissitor | tolerance |
| a voltage source contains which of the following | electromotive force, potential difference, potential energy ( all of the above) |
| a potential meter is a | variable resistor, 3 terminal deivce, voltage control device ( all of the above) |
| opposition to current is | resistance |
| the unit of electrical charge | coloumbs |
| batteries can be classified as primary or secondary based on | wether they can be recharged or not |
| to measure current with a ammeter connect the ameter to | the current path |
| what is not a neccesary procedure for for using a ohm meter to measure a resistor | observe polarity when connecting the meter leads |
| the change in enrgy form one end of the resistor to the other creates | voltage drop |
| the maxium power a resitor can handle without damage | power rating |
| power is measured in | watts |
| very high power rating resistor | wire wound |
| to obtain ressitance in ohms you must express in | amperes, volts |
| the collision of of energy when passing through a resitance results in what type of enrgy loss | heat |
| a resistor witha large physical size means in can | dissipate more heat |
| a kilo-watt hour is unit of measurment for what | energy |
| power companies charge for energy used based on | Kwh |
| if the voltage across a resistor is in units of volts and and the resistance is in kilohms what would would the answer be in | milliamperes |
| the purpose of an electrical ground is to | establish and electrical reference to ground, provide a reference point for voltage measurments,provide electrical safety (all of the above |
| voltage drop across a resistor is porportional to which other value | its own resistance |
| in a series circuit the voltage measured across an open resistor will be | the source voltage |
| a series circuit has | only one path |
| the total resistance in a series curciut is equal to | the sum of all the resistance values |
| kirchoffs law states (series circuit) | the algebraic sum of the potential rises and drops around a closed loop is zero |
| potentiometers can be classified as what | linear |
| the symbol VAB means | the voltage measured across point A to point B |
| kirchoffs current law for parallel circuits states that | the sum of the of the total currents flowing out of a junction equals the sum of the total currents flwoing into that junction |
| a current path in a circuit is also called | a branch |
| the largest resistor in a circuit has the | least current |
| as more ressitors in a parrallel curicut are added the current | increases |
| two components are parallel if | they connect across the same two nodes |
| the purpose of a shunt resistor is to | add an aditional current path to increase the current capacity of a parallel circuit |
| in a parallel resistive circuit | there is more than one current path between two points |
| the total resitance of two resistors in parallel is equal to the | product of their R values divided by the sum of the two resistors |
| a node is | any junction at which two or more components are electronically connected |
| the voltage across any branch of a parallel circuit | is equally applied to all branch conductances |
| a current path in a circuit is called | a branch |
Created by:
clyonsjones
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