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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

In Figure 18.8, the current is measured with the ammeter on the right side of the circuit diagram. When the switch is closed, does the reading on the ammeter (a) increase, (b) decrease, or (c) remain the same?

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Figure 18.8 (Quick Quizzes 18.5 and 18.6)

To determine
The magnitude of current measured in the ammeter.

Explanation

Given Info: R1 , R2 are resistors in the circuit.

Explanation:

The current choose to flow from least resistive path. If the resistance of the path increases the flow of current in that path decreases.

When the circuit is closed, both the resistors are connected parallel to each other.

The effective resistance of the circuit decreases as the current find an additional way to flow that is through resistor R2 and reaches the ammeter

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