How do the primary current and active power change with different ohmic loads in the experiment?Explain the fundamental theory of the change

The primary current and active power in an electrical circuit are directly related to the ohmic load, or resistance, in the circuit. This relationship is governed by Ohm's Law and the Power Law.

1. Ohm's Law: This law states that the current through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance between them. It is usually formulated as V = IR, where V is the voltage, I is the current, and R is the resistance.

   So, if the resistance (ohmic load) increases, the current decreases, assuming a constant voltage. Conversely, if the resistance decreases, the current increases.

2. Power Law: This law states that the power consumed in an electrical circuit is equal to the product of the voltage and the current (P = VI).

   So, if the current decreases (due to an increase in resistance), the power consumed also decreases, assuming a constant voltage. Conversely, if the current increases (due to a decrease in resistance), the power consumed also increases.

In an experiment, if you were to change the ohmic load, you would see these effects. For example, if you increase the resistance, you would see the primary current decrease and the active power decrease. If you decrease the resistance, you would see the primary current increase and the active power increase.

This is the fundamental theory behind the change in primary current and active power with different ohmic loads.