The Wien-bridge oscillator’s positive feedback circuit is  1 pointan RL circuita voltage dividera lead-lag circuitan LC circuit

The Wien-bridge oscillator's positive feedback circuit is a voltage divider.

Here's a step-by-step explanation:

1. The Wien-bridge oscillator is a type of electronic oscillator that generates sine waves. It can generate a large range of frequencies.

2. The oscillator is based on a bridge circuit originally developed by Max Wien in 1891 for the measurement of impedances.

3. The bridge comprises four resistors and two capacitors. The positive feedback is applied to the non-inverting input of the amplifier.

4. The feedback circuit is essentially a voltage divider, which is a passive linear circuit that produces an output voltage that is a fraction of its input voltage.

5. Voltage division refers to the partitioning of a voltage among the components of the divider. The voltage divider is a crucial element in the feedback circuit of the Wien-bridge oscillator.

6. The output of the voltage divider is used to provide the positive feedback necessary for the oscillator to maintain its oscillations.

So, the Wien-bridge oscillator's positive feedback circuit is not an RL circuit, a lead-lag circuit, or an LC circuit, but a voltage divider.