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CP1 > ELECTRICAL FUNDAMENTALS > Flashcards

ELECTRICAL FUNDAMENTALS Flashcards

1
Q

difference in potential

A

voltage or electromotive force

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2
Q

refers to the possibility of doing work

A

potential

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3
Q

current unit of measurement is

A

ampere

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4
Q

symbol for current is

A

I

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5
Q

opposition to current flow

A

resistance

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6
Q

unit of measure for resisitance

A

ohms

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7
Q

resistance compares to ____ ____ or the size restriction o inside pipe diameter.

A

orifice effect

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8
Q

ohms law is

A

E=IxR e=I*R

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9
Q

a 5A/50mV shunt has a voltage drop of 12mV what is the amount of current in this circuit

A

(5A / 50mV) * 12mV = 1.2A

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10
Q

a 30A/50mV shunt has a voltage drop of 10mV what is the amount of current in this circuit

A

(30A/50mV) * 10mV = 6A

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11
Q

200 mV =

A

0.2 V

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12
Q

0.03 V =

A

30 mV

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13
Q

0.5 amperes (A) =

A

500 milliamperes

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14
Q

the flow of charges along a conducting path and is measured in amperes (I)

A

Current

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15
Q

the resistance of a conductor of unit length and unit cross-sectional area

A

resistivity

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16
Q

the path followed by an electric current

A

electric circuit

17
Q

a relationship between the ratio of voltage and current to the resistance of a circuit.

A

ohms law

18
Q

the rate at which energy is used by an electrical device it is measured in watts

A

Power P = Ei or P=I^2R

19
Q

the sum of the source voltages around any closed lop is equal to the sum of the voltage drops across the resistance in that loop

A

kirchhoffs voltage law

20
Q

as much current flows away from a point as flows toward it

A

kirchhoffs current law

21
Q

current is same everywhere
voltage drops add up to total voltage
sum of individual resistance is equal to total resistance

A

series circuit

22
Q

voltage drop is same across each branch and is equal to source voltage
total current flowing into and out of the junction point of the branches equals the sum of branch currents
total resistance is equal to the reciprocal of the sum of the reciprocals of the individual resistance
the total resistance is always less than the smallest resistance in the circuit.

A

parallel circuit

23
Q

the total opposition that a circuit presents to alternating current

A

impedance

24
Q

the reference electrode is always connected to the negative terminal to obtain the proper polarity reading

A

ALWAYS

CP1 (3 decks)

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