Question

In an electromagnetic blood flow meter, the induced voltage is directly proportional to the

• A. Blood flow rate
• B. Square root of the blood flow rate
• C. Square of the blood flow rate
• D. Logarithm of the blood flow rate

Hint:

EM flow meter output voltage ∝ blood velocity $\propto$ blood flow rate.

Answer 1

The Correct Option is A

An electromagnetic blood flow meter works on Faraday's law of electromagnetic induction. When blood (a conductive fluid) moves through a magnetic field, it induces a voltage proportional to the velocity of blood flow, hence the flow rate.