When current feedback (negative) is applied to an amplifier, its input impedance ___________
A). Is decreased
B). Is increased
C). Remains the same
D). None of the above
1. For an ideal OP-amp, which of the following is true?
2. A moving iron instrument can be used for
3. Voltage dependent resistors are usually made from
4. A squirrel cage induction motor is not selected when
6. An OR gate has 6 inputs. The number of input words in its truth table are
7. In the transformer the function of a conservator is to
8. In an A.C. circuit power is dissipated in
9. Natural oil cooling is used for transformers up to a rating of