Technical Standards and Safety Authority (TSSA) G3 Practice Exam

What is the resistance between points F and G?

1. 0 ohms

2. Measurable resistance

3. Infinity

4. 20 ohms

The correct answer is: Measurable resistance

When assessing the resistance between points F and G, a measurable resistance indicates that there is a pathway for current to flow between these points. This scenario implies that the circuit is complete and there are no broken connections or significant barriers to the flow of electrical current. In the context of common electrical principles, a measurable resistance would typically be associated with components such as resistors, wires, or loads that allow for current flow. If there were a situation where the resistance was 0 ohms, it would suggest a short circuit where the electrical pathway has no resistance; alternatively, an infinite resistance would indicate an open circuit where no current can flow. A specific value like 20 ohms would denote a known resistance, but the choice highlighting just ‘measurable resistance’ encompasses any value other than the extremes of 0 or infinity. Therefore, stating that the resistance is measurable gives a clear indication of the presence of an active pathway for current, which aligns perfectly with standard electrical theory and practice in the context of analyzing circuits.