Cathodic Protection Tester Practice Exam

To which component is the primary winding of a transformer connected?

1. Load

2. Voltage source

3. Ground

4. Resistance

The correct answer is: Voltage source

The primary winding of a transformer is connected to a voltage source. This is essential because the role of the primary winding is to receive input voltage, which creates a magnetic field necessary for the transformer to operate. When an alternating current (AC) voltage is applied to the primary winding, it generates a magnetic flux in the core of the transformer. This magnetic field then induces a voltage in the secondary winding according to the principles of electromagnetic induction. The input voltage from the voltage source needs to match the specifications of the transformer, including the voltage level and frequency, to ensure efficient operation. The transformer’s design dictates the amount of voltage that can be transformed from the primary to the secondary winding, thus allowing for voltage step-up or step-down applications. Connecting the primary winding to other components, such as a load or resistance, would not facilitate the normal operation of the transformer. The load refers to what consumes the power (connected to the secondary winding), and grounding is related to electrical safety and circuit reference points rather than the primary voltage supply.