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Nadya [2.5K]
2 years ago
8

This parallel circuit has three resistors R1-120 ohm; R2-45 ohm: R3=360

Physics
1 answer:
Nina [5.8K]2 years ago
5 0

Answer:

the answer is 30 Ohms. Not found in the options provided

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2. I = \frac{q}{t} Δq over Δt technically

Rearrange for Δq

I x Δt = Δq

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Δq = 0.0075

Divide this by the fundamental charge "e"

Electrons: 0.0075 / 1.60 x 10^-19

Electrons: 4.6875 x 10^16 or 4.7 x 10^16

3.  So we know that the end resistances will be equal so:

ρ = RA/L

ρL = RA

ρL/A = R

Now we can set up two equations one for the resistance of the aluminum bar and one for the copper: Where 1 represents aluminum and 2 represents copper

\frac{p1L1}{A1}  = \frac{p2L2}{A2}\\

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\frac{A2(\frac{P1L1}{A1}) }{P2} = L2

If you fill in those values you get 0.0205

or 2.05 cm



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Margarita [4]
Mechanical energy is the answer
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