Question Set #6
Which relationship gives the equivalent resistance of resistors connected in parallel?
1/RT = 1/R1 + 1/R2 + 1/R3 + ...
To say that an electrical device has 100 Watts of power means that
100 joules of electric potential energy are transferred each second.
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? (R1 in series with R234, R23 in series and in parallel with R4)
14 Ohms
How much energy is consumed by a 20 W electrical device that is run for 2 hours?
144,000 J
What is the total resistance in this circuit if each resistor is 6 Ohms? (R1, R23, and R4 in series, R2 and R3 in parallel)
15 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
When a pair of 1-ohm resistors are connected in series, their combined resistance is
2 ohms, and when in parallel, 1/2 ohm.
A 4-ohm resistor is connected in parallel with a 4-ohm resistor. This combination produces an equivalent resistance of
2 ohms.
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.
To say that an electrical device has 200 Watts of power means that
200 joules of electric potential energy are transferred each second.
Two 400-ohm resistors in parallel give an equivalent resistance of
200 ohms.
What is the total resistance in this circuit if each resistor is 10 Ohms? (R1, R23, and R4 in series, R2 and R3 in parallel)
25 Ohms
To say that an electrical device has a current of 300 Amps flowing through it means that
300 coulombs of charge enter and leave the device every second.
Two 200-ohm resistors in series give an equivalent resistance of
400 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 series?
VT = V1 + V2 + V3 + ...
Which relationship is true for potential difference when resistors are connected in parallel?
VT = V1 = V2 = V3 = ...
The SI unit of power is the ____________.
Watt
Which circuit, X or Y, will have the greatest total current? (X- 12V battery w/ one 12 ohm resistor; Y- 12V battery w/ one 12 ohm resistor and one 6 ohm resistor)
X
Which circuit, X or Y, will have the greatest total resistance? (X- 12V battery w/ one 12 ohm resistor; Y- 12V battery w/ one 12 ohm resistor and one 6 ohm resistor)
Y
A circuit is made containing a battery and a single resistor. Decreasing the battery's electric potential difference will cause the total current in the circuit to
decrease.
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 100 Volts means that
each coulomb of charge gains 100 joules of electric potential energy.
To say that an electrical battery has an electric potential difference of 200 Volts means that
each coulomb of charge gains 200 joules of electric potential energy.
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
increase.
A circuit is made containing a battery and a single resistor. Increasing the battery's electric potential difference will cause the total current in the circuit to
increase.
As the number of resistors in a series circuit increases, the overall resistance __________ and the current in the circuit __________.
increases, decreases
To say that an electrical device has a resistance of 100-ohms means that
it would take 100 volts to cause 1 amp of current through the device.
To say that an electrical device has a resistance of 300-ohms means that
it would take 300 volts to cause 1 amp of current through the device.
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