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Equivalent resistance if the values of the two resistances

  • Thread starter XodoX
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  • #1
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Two resistors are in series. Find the equivalent resistance if the values of the two
resistances are as follows.
a) 10 [Ω] and 20 [Ω].
b) 100 [Ω] and 1 [MΩ] (M stands for “Mega” or million).
c) 3.0 [kΩ] and 6.7 [kΩ] (k stands for “kilo” or thousand).
d) 400 [Ω] and 1 [Ω].

Repeat the above problem, assuming that the resistors are in parallel.




Can anybody hel me with this, please? I have no idea how to start/do this. :confused:

Thank you!
 

Answers and Replies

  • #2
Defennder
Homework Helper
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To start you off, what do you know about how to find equivalent resistance of resistors in series and parallel?
 
  • #3
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parallel has the same voltage and the current in series stays the same?
 
  • #4
M11
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Series resistors:

Requivalent=R1+R2+R3+.......+Rn

______________________________________________________

Parallel resistors:

( 1/ Requivalent) = ( 1 / R1) + ( 1/ R2) +........+ ( 1/ Rn)

OR you can use the following equation if you have two parallel resistors:

Requivalent=[tex]\frac{R1 \times R2}{R1 + R2}[/tex]
 
Last edited:
  • #5
203
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So I just add them? a) would be 30 then.
Thank you, that works:)
 
Last edited:

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