Final answer:
The question asks about using voltage measurements to estimate the resistance using Ohm's Law, with the correct term being 'Resistance' for Rds(light). Voltage should be measured using a voltmeter connected in parallel to the NMOS.
Step-by-step explanation:
The student's question involves using voltage measurements to estimate the effective resistance between the drain and source of an NMOS transistor under bright-light conditions, which is referred to as Rds(light). To measure this resistance, you would use Ohm's Law, which states that the resistance (R) is equal to the voltage (V) across an element divided by the current (I) flowing through it (R = V/I). In practical terms for this student's experiment, after measuring the voltage (V1 and V2) across the NMOS transistor under the specified lighting conditions and knowing the current, you can calculate the resistance using the Ohm's Law formula. For the question, the correct option defining resistance is (d) Resistance.
When performing experiments to measure voltage and current, it is important to use the correct set up. A voltmeter should be connected in parallel with the component, as outlined in the provided reference material, to measure voltage across it. An ammeter would need to be connected in series to measure current. As the terminal voltage can vary with current, it should be measured directly across the NMOS transistor, ensuring that any internal resistance of the source does not affect the measurement.