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sdas [7]
3 years ago
14

What is the total resistance for the circuit? (must include unit - ohms)

Physics
1 answer:
guapka [62]3 years ago
5 0

Answer:20 ohms

Explanation:

R1=40 ohms

R2=40 ohms

Let total resistance be R

It is a parallel connection

1/R=1/R1 + 1/R2

1/R=1/40 + 1/40

1/R=(1+1)/40

1/R=2/40

Cross multiply

1x40=2xR

40=2R

Divide both sides by 2

40/2=2R/2

20=R

R=20

Total resistance is 20 ohms

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Now that we know how many joules are dissipated per flash, let's determine how flashes are needed.
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