Q. Which of the following are examples of free vortex motion?

निम्नलिखित में से कौन मुक्त भंवर गति के उदाहरण हैं?

A
Motion of air in cyclone
चक्रवात में वायु की गति
B
Motion of liquid at bottom of wash basin
वॉश बेसिन के तल पर तरल पदार्थ की गति
C
Motion of liquid inside impeller of pump
पंप के प्ररित करनेवाला के अंदर तरल की गति
D
Motion of eddies in rivers and canals
नदियों एवं नहरों में भँवरों की गति

Explanation

A free vortex occurs when no external torque is applied.

Examples include:

  • Cyclones (rotating air masses)

  • Water draining from a basin (swirling motion)

In contrast, a forced vortex (e.g., impellers or stirred fluids) requires external energy input.

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