Question

(b) describe the relationship between the amount of light shining on the ldr and the resistance of the ldr.

(c) when tanisha covers the opening in the black box, no light shines on the ldr and the ammeter reading is 0.2 a.
state the function of an ammeter.

Explanation:

Part (b)

An LDR (Light - Dependent Resistor) has a resistance that varies with light intensity. As the amount of light shining on the LDR increases, its resistance decreases. Conversely, when the amount of light decreases, the resistance of the LDR increases. This is a characteristic property of LDRs, where they are designed to be sensitive to light levels for applications like light - sensing circuits.

An ammeter is an instrument used in an electric circuit. Its primary function is to measure the electric current flowing through a circuit. It is connected in series with the component (or part of the circuit) for which the current is to be measured, so that the current being measured passes through the ammeter.

Answer:

As the amount of light shining on the LDR increases, its resistance decreases (and as the amount of light decreases, its resistance increases).

Part (c)