Physics QS 6 (Test 2)

A 20-ohm resistor is connected in parallel with a 20-ohm resistor. This combination produces an equivalent resistance of

10 ohms

Three 300-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

How many kiloWatt*hours of electrical energy are consumed by a 500 W electrical appliance that is used 1 hour each day of a 30 day month?

15 kW*hr

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

15 ohms

What is the total resistance in this circuit if R1 = 10 Ohms, R2 = 4 Ohms, R3 = 12 Ohms, and R4 = 16 Ohms?

18 ohms

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

2 ohms

How many kiloWatt*hours of electrical energy are consumed by a 30 W electrical appliance that is used 3 hours each day of a 30 day month?

2.7 kW*hr

To say that an electrical device has a current of 200 Amps flowing through it means that

200 coulombs of charge enter and leave the device every second.

How much energy is consumed by a 40 W electrical device that is run for 2 hours?

288,000 J

To say that an electrical device has 300 Watts of power means that

300 joules of electric potential energy are transferred each second.

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.

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

8 ohms

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

900 ohms

The SI unit of resistance is the _______________.

Ohm

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

RT = R1 + R2 + R3 + ...

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 current?

X

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

Y

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

decreases, increases

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

decreases, increases

To say that an electrical battery has an electric potential difference of 300 Volts means that

each coulomb of charge gains 300 joules of electric potential energy.

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 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

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 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

A circuit is made containing a battery and a single resistor. Decreasing the battery's electric potential difference will cause the total resistance of the circuit to

remain the same

A circuit is made containing a battery and a single resistor. Increasing the battery's electric potential difference will cause the total resistance of the circuit to

remain the same

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

The SI unit of electric potential difference is the ______________.

volt