Question

Which of the following pair of devices measure the same physical quantity?

• A. Ammeter, Galvanometer
• B. Ammeter, Voltmeter
• C. Galvanometer, Voltmeter
• D. Ammeter, Ohm meter

Answer 1

The Correct Option is A

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 \({\text{Ammeter, Galvanometer}} \).