Op-Amps

What is the INPUT impedance of an IDEAL amplifier?

• 0 Ω

• 100 Ω

• 1 000 Ω

• 1 000 000 Ω

• Infinite impedance

What is the Open Loop Gain of an IDEAL amplifier?

• zero

• 1

• 1 000

• a million

• infinite open loop gain

This is a COMPARATOR circuit made from an ideal operational amplifier. If V₊ = 6V and V_- = 5V, the output voltage will be...

• V_out = +1V

• V_out = +12V

• V_out = 0V

• V_out = -12V

In a comparator circuit made from a REAL Op Amp chip, V₊ < V_- . What is V_out?

• Vout = +12V

• Vout = 0V

• Vout = 1.5V

• Vout = 10.5V

What is the voltage gain in a Voltage Follower circuit?

• zero

• +1

• -1

• infinity

Which one of these circuits is an Inverting Amplifier?

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Which of these circuits is a Non-Inverting Amplifier?

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What sort of amplifier is this?

• Summing amplifier

• Voltage follower

• Inverting amplifier

• Non-inverting amplifier

What is the voltage gain of this amplifier?

• +10

• -10

• -11

• +11

What is likely to be the input impedance of this REAL (or "practical") amplifier?

• one million to ten million ohms

• 1000 ohms

• 10 thousand ohms

• zero ohms