NET, IAS, State-SET (KSET, WBSET, MPSET, etc.), GATE, CUET, Olympiads etc.: Electronics MCQs (Practice_Test 6 of 13)
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- Which of the following amplifier is used in a digital to analog converter?
- non inverter
- voltage follower
- summer
- difference amplifier
- Answer: c
- Differential amplifiers are used in
- instrumentation amplifiers
- voltage followers
- voltage regulators
- buffers
- Answer: a
- For an ideal op-amp, which of the following is true?
- The differential voltage across the input terminals is zero
- The current into the input terminals is zero
- The current from output terminal is zero
- The output resistance is zero
- Answer: c
- The two input terminals of an opamp are labeled as
- High and low
- Positive and negative
- Inverting and non inverting
- Differential ans non differential
- Answer: c
- When a step-input is given to an op-amp integrator, the output will be
- a ramp.
- a sinusoidal wave.
- a rectangular wave.
- a triangular wave with dc bias.
- Answer: a
- For an op-amp having differential gain Av and common-mode gain Ac the CMRR is given by
- Av + Ac
- Av⟋Ac
- 1 + (Av⟋Ac)
- Ac⟋Av
- Answer: b
- Hysteresis is desirable in Schmitt-trigger, because
- energy is to be stored⟋discharged in parasitic capacitances.
- effects of temperature would be compensated.
- devices in the circuit should be allowed time for saturation and desaturation.
- it would prevent noise from causing false triggering.
- Answer: c
- The output voltage Vo of the above circuit is
- a. 6V
- In the above circuit the current ix is
- a. 0.6 A
Answer: b