Question

R1=20 Om R2=20 Om Rn=?

Answer 1

Ответ:

Rпоследов=20+20=40 Ом

Rпараллельное= 20*20/(20+20)= 20/2=10 Ом

Answer 2

It seems like you want to calculate the equivalent resistance (Rn) of two resistors (R1 and R2) that have resistances of 20 ohms each when they are connected in parallel. When resistors are connected in parallel, you can use the formula for calculating the equivalent resistance:

1 / Rn = 1 / R1 + 1 / R2

In this case, both R1 and R2 have a resistance of 20 ohms:

1 / Rn = 1 / 20 + 1 / 20

Now, you can calculate the equivalent resistance (Rn):

1 / Rn = (1/20) + (1/20) = 2/20

Now, simplify the right side of the equation:

1 / Rn = 1/10

To isolate Rn, take the reciprocal of both sides:

Rn = 10 ohms

So, the equivalent resistance (Rn) of two 20-ohm resistors connected in parallel is 10 ohms.