Electronics - Operational Amplifiers - Discussion
Discussion Forum : Operational Amplifiers - General Questions (Q.No. 40)
40.
What value of input resistance is needed in the given circuit to produce the given output voltage?
50 
4 k
4.08 k
5 k
Discussion:
7 comments Page 1 of 1.
Syed altaf said:
3 years ago
Rì =( rf/Vout) * Vin.
= (200k/ 3) * 60m. (Since k and m cut each other).
= (200/ 3)* 60,
= 200* 20,
= 4000,
= 4k.
= (200k/ 3) * 60m. (Since k and m cut each other).
= (200/ 3)* 60,
= 200* 20,
= 4000,
= 4k.
Tejas dhamdhere said:
9 years ago
By using this formula R1=(RF/vout)*vin you will get the answer.
Saran said:
9 years ago
R1 = (RF/Vout)*Vin.
Mano said:
10 years ago
Please explain it.
Shyam said:
1 decade ago
R1 = (RF/Vout)*Vin.
Vandana said:
1 decade ago
Yes, I found it correct. Thanks, Rohan.
Rohan said:
1 decade ago
R1=Rf/Vout * Vin
This gives the result.
This gives the result.
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