RRB JE 2019: Op- Amp Quiz 4

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Question 1

An operational amplifier has slew rate of 2V/μ sec. If the peak output is 12 V, what will be the power bandwidth?

• A36.5 kHz
• B26.5 kHz
• C22.5 kHz
• D12.5 kHz

Question 2

In an Inverting Summing Amplifier circuit, output impedance is:

• Aunity
• Bone
• Czero
• Dinfinity

Question 3

Assertion (A): In normal operation, the non-inverting and inverting input terminals of an operational amplifier are at almost same potential.
Reason (R): The two terminals are connected together.

• ABoth A and R are true and R is the correct explanation of A
• BBoth A and R are true but R is NOT the correct explanation of A
• CA is true but R is false
• DA is false but R is true

Question 4

For an op-amp having a slew rate of 2 V/μs, if the input signal varies by 0.5 V in 10 μs, the maximum closed-loop voltage gain will be

• A50
• B40
• C22
• D20

Question 5

Assertion (A): It is not possible to design a current source using operational amplifier.
Reason (R): Operational amplifier is a voltage-controlled voltage source.

• ABoth A and R are true and R is the correct explanation of A
• BBoth A and R are true but R is NOT the correct explanation of A
• CA is true but R is false
• DA is false but R is true

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