What would be the resistivity of a perfect conductor in ohm-meters?
0
1
100
infinity

a current of 3.50 a flows through the leads of an electric appliance. how long does it take for 6.50 c of charge to pass through the leads?
1.8 s
22.8 s
0.5 s
10 s

The resistance of a perfect conductor is 0 Ohm, so the resistivity is necessarily also 0 (Ohm.meter). Resistivity = Resistance * (length)/(cross-section area).

Use the current-charge-time formula:

Current = (amount of charge) / (time) = 6.5C / t = 3.5A

so t=6.5C/3.5A = 1.86 seconds

The closest answer choice is 1.8s (but it really should have been 1.9s)

6 cos 34, 6 sin 34 trig