Nate Core Practice Test

What should the voltage reading be across good closed contacts in an energized circuit?

1. It is zero at the point of contact

2. It is the same at any point in the circuit

3. It varies due to load

4. It is the total supply voltage

The correct answer is: It is the same at any point in the circuit

In an energized circuit, the voltage reading across good closed contacts should ideally represent the same potential throughout the circuit. This is because electrical components in a closed circuit create a continuous path for current flow, maintaining a uniform voltage. When contacts are good and closed, they effectively act as a conductor with minimal resistance, so the voltage drop across them should be negligible. While there may be slight variations in voltage due to factors such as resistance in the wires or loads affecting the circuit, under normal conditions and given good contacts, the voltage will remain consistent. Thus, stating that it is the same at any point in the circuit reflects an understanding of how voltage operates in a series circuit and the fundamental principles of electricity. The other choices might reflect concepts relevant to specific conditions or types of circuits but do not accurately describe the expected behavior of voltage across good closed contacts in a properly functioning circuit.