Final answer:
A resistive layer between the electrodes and sample would impede the flow of current in the circuit and prevent the observation of a photocurrent in a photocurrent experiment.
Step-by-step explanation:
The presence of a resistive layer between the electrodes and sample would impede the flow of current in the circuit. In order for current to flow, there must be a complete path for it to travel. The resistive layer would act as a barrier, blocking the flow of electric current.
For example, imagine a situation where a resistive layer is placed between the electrodes and a sample in a photocurrent experiment. When the sample is exposed to radiation and connected to the negative terminal of a battery, a current is registered in the circuit.
However, the resistive layer would prevent the current from flowing through to the electrodes, and therefore, the photocurrent would not be observed.
In conclusion, a resistive layer between the electrodes and sample would inhibit the flow of current in the circuit and prevent the observation of a photocurrent.