To measure current through a component, is an ammeter placed in parallel or in series with the component?

To measure current through a component, is an ammeter placed in parallel or in series with the component?

• A. In parallel
• B. Across the component
• C. In series
• D. In series with the component

Answer: (D)

Measuring current through a component is done by inserting the ammeter in series with that component so the same current flows through both the component and the meter. An ammeter is designed with very low resistance to minimize any voltage drop, so placing it in series doesn't significantly affect the circuit. If the meter were placed in parallel (across) the component, it would provide a much lower-resistance path for current to flow, diverting current away from the component and potentially causing a short or an inaccurate reading. Therefore, the correct approach is to connect the ammeter in series with the component, i.e., in series with it.

Measuring current through a component is done by inserting the ammeter in series with that component so the same current flows through both the component and the meter. An ammeter is designed with very low resistance to minimize any voltage drop, so placing it in series doesn't significantly affect the circuit. If the meter were placed in parallel (across) the component, it would provide a much lower-resistance path for current to flow, diverting current away from the component and potentially causing a short or an inaccurate reading. Therefore, the correct approach is to connect the ammeter in series with the component, i.e., in series with it.