8 - Magnetic Forces and Magnetic Fields

# 8 - Magnetic Forces and Magnetic Fields - Physics 8B 8...

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Physics 8B 8 – Magnetic Forces and Magnetic Fields rev 4.0 8 – Magnetic Forces and Magnetic Fields 1. Q: Sketch the magnetic field for a bar magnet 2. Q: Two bar magnets are placed so that their unlike poles are facing each other as shown. Sketch the magnetic field around and between the two magnets. S N S N 3. a) Q: Draw the magnetic field lines associated with the two north poles shown below. b) Q: Are there any points in this magnetic field where a small compass needle would experience zero force? S N N S S N

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Physics 8B 8 – Magnetic Forces and Magnetic Fields rev 4.0 4. Q: What is the direction of the force on the current carrying conductor in the magnetic field in each of the cases 1 to 8 shown below? B B I •I x I I B B I out of page I into page (1) (2) (3) (4) B into page B out of page out of page x x x x • • • • I x x x x • • • • N S x x x x I • • • • N S x x x x • • • • I I (5) (6) (7) (8) 5. Q: What is the direction of the force on the particle (p=proton, e=electron, n=neutron) in cases 1 to 8 shown below? B B v e •v p x v n v p B B v p out of page v n into page (1) (2) (3) (4) B into page B out of page out of page x x x x • • • • v e x x x x • • • •
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