friday_rev - Physics 7B, Spring 2010 Final Exam Review...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Physics 7B, Spring 2010 Final Exam Review Session (Friday) Peter Battaglino Problem 1: A magnetohydrodynamic drive, or MHD drive for short, utilizes a strong magnetic field to propel a conducting fluid out of the back of a vehicle. For example, the vehicle might be a space-craft, and the conducting fluid might be an ionized plasma, or the vehicle could be a submarine and the conducting fluid ocean water. Two magnets create a magnetic field B pointing downwards, and a battery is used to keep a voltage V between two conducting pads, causing a current to flow through the fluid between the pads. Supposing that the pads have area A , that they are separated by a distance L , and that the fluid has conductivity σ , compute the magnitude and direction of the propulsion force created by the MHD drive. Figure 1: Problem 1: An MHD drive. Problem 2: You have a solenoid of radius R and length L . However, the number of turns per unit length varies with the length z along the solenoid as n ( z ) = n
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/30/2010 for the course PHYSICS ?? taught by Professor Zettle during the Spring '08 term at University of California, Berkeley.

Page1 / 3

friday_rev - Physics 7B, Spring 2010 Final Exam Review...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online