Which of the following pair of devices measure the same physical quantity?
- Ammeter, Galvanometer
- Ammeter, Voltmeter
- Galvanometer, Voltmeter
- Ammeter, Ohm meter
The Correct Option is A
Solution and Explanation
To solve the problem, we need to determine which pair of devices measures the same physical quantity.
1. Understanding the Devices:
- Ammeter: Measures electric current flowing through a circuit.
- Galvanometer: A sensitive instrument used to detect and measure small electric currents.
- Voltmeter: Measures potential difference (voltage) between two points.
- Ohmmeter: Measures electrical resistance.
2. Comparing the Pairs:
- Option (1): Ammeter and Galvanometer — both measure current (galvanometer for small currents, ammeter for larger currents). ✅
- Option (2): Ammeter (current), Voltmeter (voltage) — different quantities ❌
- Option (3): Galvanometer (current), Voltmeter (voltage) — different quantities ❌
- Option (4): Ammeter (current), Ohmmeter (resistance) — different quantities ❌
Final Answer:
The correct pair that measures the same physical quantity is \({\text{Ammeter, Galvanometer}} \).
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