Final Answer:
An ammeter is connected in a circuit in which of the following ways? The correct answer is 4. In series with the circuit.
Step-by-step explanation:
An ammeter is a device used to measure the electric current flowing through a circuit. When connecting an ammeter, it is essential to choose the appropriate configuration to ensure accurate current measurement. The correct method is to connect the ammeter in series with the circuit.
In a series circuit, the current remains constant throughout, and placing the ammeter in series allows it to measure the total current flowing through the circuit. Connecting the ammeter in parallel (option 1) would provide a parallel path for the current, affecting the measurement accuracy. Similarly, a series-parallel connection (option 2) would create complications and inaccurate readings.
To elaborate, Ohm's Law (I = V/R) states that current (I) is equal to voltage (V) divided by resistance (R). In a series connection, the current passing through each component is the same. Placing the ammeter in series ensures that it becomes part of the main circuit, accurately measuring the total current without altering the circuit's characteristics. Therefore, the correct choice is to connect the ammeter in series with the circuit, allowing for precise current measurement.