Can an op amp amplify DC voltage?

Related questions

1. How do op amps work?
2. Does higher voltage mean higher current?
3. Is diode a linear device?
4. What is the difference between amplifier and operational amplifier?
5. What is mean by op amp?
6. Which feedback is used in amplifiers?
7. Why op amps are called linear devices?
8. What is ideal op amp?
9. Why is it called IC 741?
10. Why does an operational amplifier need two power supplies?

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