Physics 9702 · AS & A Level · Characteristics of alternating currents

Characteristics of alternating currents — practice question

An ideal operational amplifier (op-amp) would have a voltage gain that remains constant and an infinite slew rate.
(a(i))[1]

State the meaning of gain of an amplifier.

(a(ii))[2]

State the meaning of infinite slew rate.

(b(i))[2]

On Fig. 7.1, finish the circuit for the non-inverting amplifier.

(b(ii))[2]

In the completed circuit shown in Fig. 7.1, the amplifier gain is $25$. Resistor $R_1$ has a resistance of $12\,\text{k}\Omega$. Calculate the resistance of resistor $R_2$.

(b(iii))[2]

Calculate, for an amplifier gain of $25$, the range of $V_{\text{IN}}$ values for which saturation does not occur.

Worked solution & mark scheme

This 9-mark question has a full step-by-step worked solution and mark scheme. One marking point: The output voltage divided by the input voltage

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