What does a current meter measure?

✅Explanation:
A current meter is an instrument used to measure the velocity of water flow in rivers, streams, and other bodies of water. It helps determine how fast the water is moving, which is crucial for hydrological studies, water management, and environmental monitoring.

📌Other Options Explanations:
-(a) Electric current: Electrical current meters are used to measure the flow of electricity.
-(b) Rainfall: Rain gauges are used to measure the amount of rainfall.

🛑 Additional Information::
Current meter: It is the device that is used to measure the velocity of the flow of fluid.
The relation between velocity and the number of revolutions completed by current meter is
V = a × N + b
Where,
V = velocity in m/s, and N = Number of revolutions done by current meter in 1 second
a & b = current meter constant.