What happens in a circuit with a high resistance?

Prepare for the NCEA Level 2 Physics Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

In a circuit with high resistance, current struggles to flow because resistance opposes the movement of electric charge. According to Ohm's Law, which states that voltage (V) equals current (I) times resistance (R), when the resistance is high and the voltage remains constant, the current will decrease. This means that as resistance increases, fewer electrons can pass through the circuit each second, resulting in a lower current.

It's important to understand that if the resistance is very high, the current can become very small, potentially reaching zero if the resistance is infinite. However, the scenario described by the answer emphasizes that while the current does decrease, it does not outright negate the possibility of some current flowing unless the resistance reaches an extreme limit. Thus, in practical terms, a high-resistance circuit severely restricts current flow, making it difficult for it to pass through.

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