Circuit Diagram Physics Example 1

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Example 1

easy
A circuit diagram shows a 6 V6 \text{ V} battery connected to a 2 Ω2 \text{ } \Omega resistor with an ammeter in series. What reading does the ammeter show?

Solution

  1. 1
    An ammeter is connected in series to measure current through a component.
  2. 2
    The ammeter has negligible resistance, so it does not significantly affect the circuit.
  3. 3
    Current: I=VR=62=3 AI = \frac{V}{R} = \frac{6}{2} = 3 \text{ A}

Answer

I=3 AI = 3 \text{ A}
Circuit diagrams use standard symbols for components. An ammeter (circle with 'A') is always placed in series with the component whose current you want to measure, since current must flow through it.

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A simplified drawing of an electrical circuit using standardized symbols for components like batteries, resistors, switches, and bulbs.

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