True or False: The voltmeter is always connected in parallel in the circuit, as well as the ammeter.
The correct answer and explanation is:
Answer: False
A voltmeter is connected in parallel in a circuit, but an ammeter is connected in series. This distinction is crucial in understanding how these devices function in a circuit.
A voltmeter is designed to measure the potential difference (voltage) across two points in a circuit. It is connected in parallel to the component or section of the circuit where the voltage is being measured. This is because the voltmeter needs to experience the same potential difference as the component, so it is placed across it. Since the voltmeter has a very high internal resistance, it draws minimal current, which ensures it does not alter the current flowing in the circuit.
On the other hand, an ammeter measures the current flowing through a circuit. To do this accurately, it must be connected in series with the circuit or the component whose current is being measured. This ensures that all the current passing through the circuit also flows through the ammeter. An ammeter has a very low internal resistance to avoid limiting the current in the circuit. If it were placed in parallel, it could create a short circuit, drawing excessive current and potentially damaging both the ammeter and the circuit.
Therefore, while the voltmeter is always connected in parallel to measure voltage, the ammeter must always be placed in series to measure current. This arrangement ensures that both instruments provide accurate readings without interfering with the normal functioning of the circuit.