4. Note the direction of the external magnetic field in Figure P20.10; it is int

Question

4. Note the direction of the external magnetic field in Figure P20.10; it is into the page. 10. W The flexible loop in x Figure P20.10 has a radius of 12 cm and is in a magneticKX field of strength 0.15 T. The loop is grasped at points A and Band stretched until its area is nearly zero. If it takes 0.20 s to close the loop, what is the mag- nitude of the average induced emf in it during this time? Figure P20.10 Problems 20. 12. and Magnitude of Induced EMF 5. As the area of the loop shrinks in the example above the induced current in the loop is a) Clockwise b) Counterclockwise c) Impossible to Know for Sure Show your work and make it clear how you arrived at your

Explanation / Answer

The emf induced is given by the following:

EMF = ??/?t

= BA/?t

= (0.15)?(0.12)² / (0.20)

= 0.0339 V (or 33.9 mV)

Related Questions

Navigate

• Browse (All)
• Browse 4
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.