Question

connect 30ohm,40ohm,60ohm,120ohm in such way that resultant resistance =50ohm​

Answer 1

Combination of parallel resistors can be calculated as below,

1/R =1/r1 + 1/r2 +….. + 1/rn

Where r1, r2 are the resistors which are connected in parallel,

So according to above formula

We have,

Req=30*60/90 = 20.

Hope it is helpful.

Zeel Mehta

To get the maximum value connect them in series where the resistance is added

Req=60+30=90ohms

If they are connected in parallel, then

Req=(60*30)/(60+30)

Req=20ohms

If you combining of o resistance in parallel

30×60/90=20 ohm

In series combination

30+60= 90 ohm

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