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