Question

Bruce collects the data on four electric circuits listed in the table.

circuit-voltage-resistance
w-18-38
x-24-34
y-34-70
z-12-18
Bruce must report any circuits that deliver more than 4.0 C of charge in 8.0 s.

Which lists every circuit that Bruce must include in his report?

X and Z
X and Y
W and Y
W and Z

Answer 1

Answer: A) X and Z

Step-by-step explanation:

Got it right on edge.

Answer 2

Answer : X and Z

Explanation :

For w :

Voltage,
`V=18\ V`

resistance,
`R=38\ \Omega`

so,
`V=IR`

`I=(V)/(R)`

`I=(18\ V)/(38\ \Omega)`

`I=0.47`

`q=0.47*8`

So charge,
`q=It`

`q=3.76\ C`

For x :

Voltage,
`V=24\ V`

resistance,
`R=34\ \Omega`

so,
`V=IR`

`I=(V)/(R)`

`I=(24\ V)/(34\ \Omega)`

`I=0.705`

`q=0.705*8`

So charge,
`q=It`

`q=5.64\ C`

For y :

Voltage,
`V=34\ V`

resistance,
`R=70\ \Omega`

so,
`V=IR`

`I=(V)/(R)`

`I=(34\ V)/(70\ \Omega)`

`I=0.485`

`q=0.485*8`

So charge,
`q=It`

`q=3.88\ C`

For z :

Voltage,
`V=12\ V`

resistance,
`R=18\ \Omega`

so,
`V=IR`

`I=(V)/(R)`

`I=(12\ V)/(18\ \Omega)`

`I=0.66`

`q=0.66*8`

So charge,
`q=It`

`q=5.28\ C`

So, the circuits X and Z delivers 5.64 C and 5.28 C of charge.

Hence, Bruce must include X and Z in his report.