Question:
If an ammeter is to be used in place of a galvanometer, then we must connect
If an ammeter is to be used in place of a galvanometer, then we must connect
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When replacing a galvanometer with an ammeter, it is important to use low resistance in parallel to ensure the current is measured accurately without significant influence on the circuit.
Updated On: Jun 30, 2026
- low resistance in parallel.
- high resistance in series.
- high resistance in parallel.
- low resistance in series.
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the characteristics of a galvanometer.
A galvanometer is a sensitive instrument used to measure small currents. Its resistance is typically quite high. When replacing a galvanometer with an ammeter, we need to consider the fundamental differences between the two.
- An ammeter is designed to measure larger currents. To avoid altering the current flowing through the circuit, the ammeter must have very low resistance.
Step 2: Key principle of connecting the ammeter.
In order to prevent the ammeter from altering the current in the circuit, it must be connected in parallel to the circuit, with low resistance. This ensures that the majority of the current passes through the circuit, and a small portion is diverted through the ammeter for measurement.
Step 3: The importance of low resistance.
To accurately measure the current without affecting the overall current, the resistance of the ammeter should be kept as low as possible. This minimizes the voltage drop across the ammeter and ensures the circuit’s behavior remains unchanged.
Final Answer:
Thus, the correct answer is to connect a low resistance in parallel to the circuit to replace the galvanometer with an ammeter:
\[ \boxed{\text{low resistance in parallel}}. \]
A galvanometer is a sensitive instrument used to measure small currents. Its resistance is typically quite high. When replacing a galvanometer with an ammeter, we need to consider the fundamental differences between the two.
- An ammeter is designed to measure larger currents. To avoid altering the current flowing through the circuit, the ammeter must have very low resistance.
Step 2: Key principle of connecting the ammeter.
In order to prevent the ammeter from altering the current in the circuit, it must be connected in parallel to the circuit, with low resistance. This ensures that the majority of the current passes through the circuit, and a small portion is diverted through the ammeter for measurement.
Step 3: The importance of low resistance.
To accurately measure the current without affecting the overall current, the resistance of the ammeter should be kept as low as possible. This minimizes the voltage drop across the ammeter and ensures the circuit’s behavior remains unchanged.
Final Answer:
Thus, the correct answer is to connect a low resistance in parallel to the circuit to replace the galvanometer with an ammeter:
\[ \boxed{\text{low resistance in parallel}}. \]
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