The ring moves away from the a) 6.3 x 10-1 Wb magnet because the induced field b) 31 V tries to oppose the direction of the c) 4.6 A original field (Lenz’s Law). d) Clockwise The bar magnet creates an increasing e) 1.4 x 102 W magnetic field directed into the loops. The loops will create a field a) 9.0 x 10-2 V to oppose this by carrying a b) Counter -clockwise clockwise current; current flows c) 0.26A from b to a, so VB-VA is d) 0.023W positive. e) 0.046N Counter-clockwise none a) 1.0 V Counter-clockwise b) Counter-clockwise No induced current. c) 7.4A a) Clockwise b) Counter-clockwise d) 7.4 W Counter-clockwise e) 3.7 N 1.9 V 1.3 x 101 V a) 3.4V 1.1 T b) Clockwise 2.6 x 101 V c) 1.4 A 3.5 m/s d) 4.8 W 2.8 T e) 1.1N General Problems a) 6.2 V a) 1.0 x 10-1 Wb b) 2.5A b) 3.4 V c) +y direction c) 5.7A d) 2.4 A d) Clockwise e) direction –y e) 1.9 x101 W f) 0.1A g) +y direction
The ring moves away from the magnet because the induced field tries to oppose the direction of the original field (Lenz’s Law). The bar magnet creates an increasing magnetic field directed into the loops. The loops will create a field to oppose this by carrying a clockwise current; current flows from b to a, so VB-VA is positive. Counter-clockwise none Counter-clockwise No induced current. a) Clockwise b) Counter-clockwise Counter-clockwise 1.9 V 1.3 x 101 V 1.1 T 2.6 x 101 V 3.5 m/s 2.8 T General Problems a) 1.0 x 10-1 Wb b) 3.4 V c) 5.7A d) Clockwise e) 1.9 x101 W a) 6.3 x 10-1 Wb b) 31 V c) 4.6 A d) Clockwise e) 1.4 x 102 W a) 9.0 x 10-2 V b) Counter -clockwise c) 0.26A d) 0.023W e) 0.046N a) 1.0 V b) Counter-clockwise c) 7.4A d) 7.4 W e) 3.7 N a) 3.4V b) Clockwise c) 1.4 A d) 4.8 W e) 1.1N a) 6.2 V b) 2.5A c) +y direction d) 2.4 A e) –y direction f) 0.1A g) +y direction
electromagnetic-induction-chapter-problems-2013-07-12.docx