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chapter 6 > chapter 6 > Flashcards

chapter 6 Flashcards

1
Q

parallel circuits have more than on path for current?

A

true

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2
Q

the parallel current rule states that the sum of the individual branch currents equals the total source current?

A

true

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3
Q

to calculate the total resistance in a parallel circuit, a general formula is needed. what is it called

A

reciprocal equation for parallel resistance

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4
Q

the fact that the total circuit resistance ________ as resistance is added to a parallel circuit is easily misunderstood.

A

decreases

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5
Q

to calculate the total resistance in a parallel circuit, which equation is used?

A

(1/R1+1/R2+1/R3…..1/Rn)=1/Rt

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6
Q

find the total resistance of four resistors in parallel. They are 10 ohms,20 ohms, 40 ohms, and 60 ohms.

A

5.2 ohms

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7
Q

if a parallel circuit has only two branches, Rt=

A

R1R2/(R1+R2)

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8
Q

find the total resistance in ohms of a circuit with a 55 ohm resistor in parallel with an 83 ohm resistor.

A

33.08 ohms

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9
Q

if a circuit requires _____ current and ____ voltage, sources can be connected in parallel to combine their currents.

A

higher, the same

current adds, voltage stays the same in parallel

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10
Q

which formula can be used to calculate power in a parallel circuit?

A

P=IE

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11
Q

what is the total power of a parallel circuit with a 100V voltage source and resistances of 150 ohms and 250 ohms?

A

106.67W

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12
Q

in a parallel circuit, the total current is the ______ of the individual component currents.

A

sum

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13
Q

a rule for parallel circuit resistance states that the total resistance is less than the smallest branch _____.

A

resistor

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14
Q

if a parallel circuit has only two branches, a simple equation can be used. this formula is referred to as the _______ method to determine total resistance.

A

resipical product over sum

R1R2/(R1+R2)

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15
Q

one of the most common reasons for connecting voltage sources in parallel is to supply more ______ to a circuit.

A

current

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16
Q

a 24V circuit supplies 3 camera heaters in parallel. two heaters draw 2Aeach and the third draws 3A. what is the total power of the circuit?

A

168 W

17
Q

the sum of the power consumed in each component of a series circuit is equal to?

A

VtxIt or ExI

18
Q

what is Kirchhoffs current law?

A

I1+I2+In=It in parallel

19
Q

what is Kirchhoffs voltage law?

A

V1+V2+Vn=Vt in series

20
Q

you have a ¼W 4.7 kilo ohm resistor, what is the maximum voltage that can be applied without damaging the resistor?

A

34.28V

look at calc chart

21
Q

how would you describe the difference between a series circuit and a parallel circuit?

A

series current stays the same parallel voltage stays the same

22
Q

what happens to voltage if batteries are connected in series? parallel?

A

increases, stays the same

chapter 6 (1 decks)

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