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Physics 1 Problem Solutions 231

# Physics 1 Problem Solutions 231 - Chapt 30 Currents Causing...

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Unformatted text preview: Chapt. 30 Currents Causing Magnetic Fields Multiple-Choice Problems 030 qmult 00100 1 1 5 easy memory: electro-magnetic connection Extra keywords: physci if magnetism is covered 1. Hans Christian Ørsted (1777–1851) in 1820 found that a current (of electric charge) generated: a) a Bessel function. b) a Hermite polynomial. c) Michael Faraday. d) a Hooke’s law force. e) a magnetic force. 030 qmult 00110 1 1 4 easy memory: cause of magnetic fields 2. Magnetic fields are caused by time-varying electric fields and by: a) magnetic monopoles. b) magnetic torques. c) static charge distributions. d) currents and elementary particle magnetic dipoles. e) streams. 030 qmult 00120 1 1 1 easy memory: Biot-Savart law 3. The Biot-Savart law is: a) d vector B = μ 4 π I dvectors × ˆ r r 2 . b) vector E ( vector r ) = kq r 2 ˆ r . c) contintegraldisplay vector B · dvectors = μ I enc . d) contintegraldisplay vector E · d vector A = q enc ε . e) E = mc 2 ....
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