HW05-Solutions

# HW05-Solutions - Physics 201 Solution Set 05 CHAPTER 27 28...

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Physics 201 Solution Set 05 CHAPTER 27 & 28: Magnetism 27[ 5, 16, 17, 19, 36, 44, 59 ] 28[ 2, 3, 5, 13, 25, 68 ] 1 5. ( a ) By the right hand rule, the magnetic field must be pointing up, and so the top pole face must be a South pole . ( b ) Use Eq. 27-2 to relate the maximum force to the current. The length of wire in the magnetic field is equal to the diameter of the pole faces. ( ) ( )( ) 2 max max 7.50 10 N 3.4091A 3.41A 0.100m 0.220T F F I B I B × = = = = A A ( c ) Multiply the maximum force by the sine of the angle between the wire and the magnetic field. ( ) 2 2 max sin 7.50 10 N sin80.0 7.39 10 N F F θ = = × ° = × 16. Since the charge is negative, the answer is the OPPOSITE of the result given from the right hand rule applied to the velocity and magnetic field. ( a ) left ( b ) left ( c ) upward ( d ) inward into the paper ( e ) no force ( f ) downward 17. The right hand rule applied to the velocity and magnetic field would give the direction of the force. Use this to determine the direction of the magnetic field given the velocity and the force.

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