{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Ield b along the axis of solenoid i to the magnetic

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ual currents are present in the two solenoids, the ratio of the magnetic b. ield B .along the axis of solenoid I to the magnetic field B along the axis of solenoid II, B /B , is f 4 aI II I II a. µ I 1/4. 0 b. 1/2. c. . c. 2 a 1. d. µ 0 I 2 d. . e. 4. a 2µ 0 I e. . a Some Difficult Problems ____ 19. A square coil (length of side = 24 cm) of wire consisting of two turns is placed in a uniform magnetic field that makes an angle of 60° with the plane of the coil. If the magnitude of this field increases by 6.0 mT every 10 ms, what is the magnitude of the emf induced in the coil? 5 a. 55 mV b. 46 mV c. 50 mV d. 60 mV e. 35 mV ____ 20. A rod (length = 10 cm) moves on two horizontal frictionless conducting rails, as shown. The magnetic field in the region is directed perpendicularly to the plane of the rails and is uniform and constant. If a constant force of 0.60 N moves the bar at a constant velocity of 2.0 m/s, what is the current through the 1 2-Ω load resistor? Demo: Hertz Experiment In 1887, Heinrich Hertz first demonstrated that EM fields can transmit over space. Hertz Experiment: Conceptual Schematic Sources of E and B Fields q༇  Sources for the electric field: §༊  Electric charges (Coulomb's Law, static) à༎subjects of past several weeks §༊  Change of B field (Faraday's Law, varying in time) q༇  Sources for the magnetic field: §༊  Electric current (Biot-Savart Law/Ampere’s Law, static) §༊  Change of E field (Ampere-Maxwell Law, varying) è༎ All these features are summarized in Maxwell Equations. Review: (1) Gauss’s Law / Coulomb’s Law q༇  The relation between the electric flux through a closed surface and the net charge q enclosed within that surface is given by the Gauss’s Law ∫ q E • dA = ε0 (2) Gauss’s Law for Magnetism q༇  The Gauss’s Law for the electric flux is a reflection of the existence of electric charge. In nature we have not found the equivalent, a magnetic charge, or monopole q༇  We can express this result differently: if any closed surface as many lines enter the encl...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online