PHYC 112 Question Set 12

Which relationship gives the equivalent resistance of resistors connected in parallel?

1/RT = 1/R1 + 1/R2 + 1/R3 + ...

Three 300-ohm resistors in parallel give an equivalent resistance of

100 ohms

Two 200-ohm resistors in parallel give an equivalent resistance of

100 ohms

Four 300-ohm resistors in series give an equivalent resistance of...

1200 ohms

What is the total resistance in this circuit if R1 = 8 Ohms, R2 = 6 Ohms, R3 = 6 Ohms, and R4 = 12 Ohms?

14 ohms

What is the total resistance in this circuit if each resistor is 6 Ohms?

15 ohms

A 4-ohm resistor is connected in parallel with a 4-ohm resistor. This combination produces an equivalent resistance of

2 ohms

When a pair of 1-ohm resistors are connected in series, their combined resistance is

2 ohms, and when in parallel, 1/2 ohm.

Two 200-ohm resistors in series give an equivalent resistance of

400 ohms

What is the total resistance in this circuit if each resistor is 20 Ohms?

50 ohms

Three resistors, 1-ohm, 2-ohm, and 3-ohm are connected in series. Their equivalent resistance is

6 ohms

Three 300-ohm resistors in series give an equivalent resistance of

900 ohms

Which relationship gives the equivalent resistance of resistors connected in series?

RT = R1 + R2 + R3 + ...

Which of the following relationships is true?

V1 + V2 + V4 = VT

Suppose the battery EMF is 24 V in the circuit pictured above. Which of the following relationships is true, no matter what the resistance of the bulbs are?

VA + VB + VC + VE = 24 V

Suppose the battery EMF is 24 V in the circuit pictured above. Which of the following relationships is true, no matter what the resistance of the bulbs are?

VA + VC + VD + VF = 24 V

Suppose the battery EMF is 24 V in the circuit pictured above. Which of the following relationships is true, no matter what the resistance of the bulbs are?

VB + VC = VD

Which relationship is true for potential difference when resistors are connected in series?

VT = V1 + V2 + V3 + ...

Which relationship is true for potential difference when resistors are connected in parallel?

VT = V1 = V2 = V3 = ...

Which circuit, X or Y, will have the greatest total resistance?

Y

Kirchhoff's Junction Law/Rule is essentially a conservation of _____________ statement.

charge

Three resistors (R1, R2, and R3) are connected in series and powered by a battery. Which current relationship is true for these resistors?

i1 = i2 = i3 = iT, regardless of the resistance of each resistor

As the number of resistors in a parallel circuit decreases, the overall resistance __________ and the current in the circuit __________.

increases; decreases

As the number of resistors in a series circuit increases, the overall resistance __________ and the current in the circuit __________.

increases; decreases

Compared to the resistance of two resistors connected in series, the same two resistors connected in parallel have

less resistance

A 300-ohm resistor is connected in parallel with a 200-ohm resistor. We can say for certain that their total resistance is

less than 200 ohms.

Whenever resistors are connected in parallel, their equivalent resistance will always be...

less than the lowest individual resistor's value.

When two resistors are connected in parallel to a battery, the electrical resistance that the battery senses is

less than the resistance of either resistor.

When two resistors are connected in series to a battery, the electrical resistance that the battery senses is

more than the resistance of either resistor.

Which resistor arrangement will result in the greatest total current?

parallel

To obtain a more accurate potential difference reading, voltmeters are connected in ____________ with the device and must have very ___________ resistance.

parallel; high

Which resistor arrangement will result in the least total current?

series

To obtain a more accurate current reading, ammeters are connected in ____________ with the device and must have very ___________ resistance.

series; low