An Electromagnetic Flowmeter Is Useful When It Is Desirable Not $v$

question 110

Multiple Choice

An electromagnetic flowmeter is useful when it is desirable not to interrupt the system in which the fluid is flowing (such as the blood in an artery during heart surgery) . Such a device is illustrated in the figure. The conducting fluid moves with speed $v$ in a tube of diameter $d$ . Perpendicular to this tube is a magnetic field B. A voltage $V$ is induced between opposite sides of the tube due to the motion of the conducting fluid in the magnetic field. For a certain case, $B =$ $0.120 \mathrm {~T} , d = 1.2 \mathrm {~cm}$ , and the measured voltage is $V = 2.88 \mathrm { mV }$ . Determine the speed of the fluid.

• A) \(11 \mathrm {~m} / \mathrm { s }\)
• B) \(750 \mathrm {~m} / \mathrm { s }\)
• C) \(0.075 \mathrm {~m} / \mathrm { s }\)
• D) \(1.1 \mathrm {~m} / \mathrm { s }\)
• E) \(2.0 \mathrm {~m} / \mathrm { s }\)

Understand how and when to use the STAR technique in responses.

Grasp the significance of follow-up communication after an interview.

Realize the importance of appearance, nonverbal cues, and eye contact in online interviews.

Understand the role and preparation of references in job applications.

---

Definitions:

Risk-Free Rate

The return on an investment with no risk of financial loss, typically represented by the yield on government Treasury bonds.

Well-Diversified Portfolio

A portfolio spread out over many securities in such a way that the weight in any security is close to zero, resulting in negligible diversifiable risk.

Systematic Risk

The risk inherent to the entire market or market segment, which cannot be eliminated through diversification.

Unsystematic Risk

Unsystematic risk refers to the risk associated with individual investments or sectors, not affected by broader market movements.