Test 3 - Physics 116 B Sec 2 (Prof. Csorna) 10/26/05...

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Physics 116 B Sec 2 (Prof. Csorna) 10/26/05 TEST #3 Formulas and Constants:
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–19 C) is moving at 3 × 10 5 m/s in the positive x direction. A magnetic field of 0.8 T is in the positive z direction. The magnetic force on the electron is: A) 0 B) 4 × 10 –14 N in the positive z direction C) 4 × 10 –14 N in the negative z direction D) 4 × 10 –14 N in the positive y direction E) 4 × 10 –14 N in the negative y direction ans D 2. Electrons (mass m , charge – e ) are accelerated from rest through a potential difference V and are then deflected by a magnetic field 4 that is perpendicular to their velocity. The radius of the resulting electron trajectory is: A) ( 29 2 eV m B D) 2 B mV e B) 2 B eV m E) none of these C) ( 29 2 mV e B ans C 3. A square loop of wire lies in the plane of the page and carries a current I as shown. There is a uniform magnetic field 4 parallel to the side MK as indicated. The loop will tend to rotate: A) about PQ with KL coming out of the page B) about PQ with KL going into the page C) about RS with MK coming out of the page
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Test 3 - Physics 116 B Sec 2 (Prof. Csorna) 10/26/05...

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