# NTA (UGC)-NET: Electronics MCQs (Practice_Test 8 of 13)

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1. A non inverting closed loop op amp circuit generally has a gain factor

1. Less than one

2. Greater than one

3. Of zero

4. Equal to one

Answer: b

2. If ground is applied to the ( + ) terminal of an inverting op-amp, the ( — ) terminal will

1. Not need an input resistor

2. Be virtual ground

3. Have high reverse current

4. Not invert the signal

Answer: b

3. The closed-loop voltage gain of an inverting amplifier equal to

1. The ratio of the input resistance to feedback resistance

2. The open-loop voltage gain

3. The feedback resistance divided by the input resistance

4. The input resistance

Answer: c

4. An ideal OP-AMP is an ideal

1. Current controlled Current source

2. Current controlled voltage source

3. Voltage controlled voltage source

4. voltage controlled current source

Answer: b

5. Calculate the cutoff frequency of a first-order low-pass filter for R1 = 2.5 k and C1 = 0.05 F

1. 1.273kHz

2. 12.73kHz

3. 127.3 kHz

4. 127.3 Hz

Answer: a

6. How many op-amps are required to implement this equation Vo = V1

1. 4

2. 3

3. 2

4. 1

Answer: d

7. An OPAMP has a slew rate of 5 V/µS. The largest sine wave O/P voltage possible at a frequency of 1 MHZ is

1. 10 volts

2. 5 volts

3. 5/3 volts

4. 5/2 volts

Answer: d

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