# _013 - Solution for Homework 14 Introduction to Magnetic Fields Solution to Homework Problem 14.1(Right Handed Coordinate Systems Problem If the y

This preview shows pages 1–3. Sign up to view the full content.

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Solution for Homework 14 Introduction to Magnetic Fields Solution to Homework Problem 14.1(Right Handed Coordinate Systems) Problem: If the y axis points to the right of the page and the z axis points to the top of the page, what direction does the x axis point? Select One of the Following: (a) To the left of the page. (b) To the right of the page. (c) To the top of the page. (d) To the bottom of the page. (e-Answer) Out of the page (f) Into the page Solution To yield a right handed coordinate system, ˆ x × ˆ y = ˆ z . If your fingers point out of the page and you curl your hand toward the y axis, your thumb points to the top of the page in the direction of the z axis. Therefore, the x axis points out of the page. Total Points for Problem: 3 Points Solution to Homework Problem 14.2(Magnetic Field Inside of Solenoid) Problem: An infinite solenoid has 15 turns per meter and a current of 8 . 0A . What is the magnetic field INSIDE the solenoid? Select One of the Following: (a-Answer) 1 . 5 × 10 − 4 T (b) 1 . 5 × 10 − 5 T (c) (d) Cannot be determined because the distance from the solenoid is not given. Solution The magnetic field inside an infinite solenoid is B = μ nI = (4 π × 10 − 7 Tm A )(15)(8A) = 1 . 5 × 10 − 4 T Total Points for Problem: 3 Points Solution to Homework Problem 14.3(Magnetic Field Outside of Solenoid) Problem: An infinite solenoid has 15 turns per meter and a current of 8A . What is the magnetic field OUTSIDE the solenoid? 1 Select One of the Following: (a) 1 . 5 × 10 − 4 T (b) 1 . 5 × 10 − 5 T (c-Answer) (d) Cannot be determined because the distance from the solenoid is not given. Solution The magnetic field outside an infinite solenoid is 0. Total Points for Problem: 3 Points Solution to Homework Problem 14.4(Exploding Capacitor Velocity) Problem: In the book, Electronic Gadgets for the Evil Genius , they describe an electronic pulser that uses capacitors with energy storage of 5000 . 0J . If something went wrong, and all this energy got converted into kinetic energy of a small piece of metal (say of the mass of a 45 caliber bullet m = 0 . 0149kg ), how fast would the piece of metal be going? Note this is strickly a kinetics problem, no electricity and magnetism required. Second note, be very careful with high voltage systems. For your reference, the muzzle velocity of a rifle is about 350 m s ....
View Full Document

## This note was uploaded on 05/04/2008 for the course PHYS 2074 taught by Professor Stewart during the Winter '08 term at Arkansas.

### Page1 / 7

_013 - Solution for Homework 14 Introduction to Magnetic Fields Solution to Homework Problem 14.1(Right Handed Coordinate Systems Problem If the y

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online