Chapter 30: Q. 1 (page 868)
What is the direction of the induced current in FIGURE Q

Short Answer
The direction of the induced current is determined as, a counterclockwise current creates the next force , which tends to tends flux inside the loop.
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Chapter 30: Q. 1 (page 868)
What is the direction of the induced current in FIGURE Q

The direction of the induced current is determined as, a counterclockwise current creates the next force , which tends to tends flux inside the loop.
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81. III In recent years it has been possible to buy a capacitor. This is an enormously large amount of capacitance. Suppose you want to build a oscillator with a capacitor. You have a spool of 0.25-mm-diameter wire and a -diameter plastic cylinder. How long must your inductor be if you wrap it with 2 layers of closely spaced turns?
What value of resistorgives the circuit in FIGURE a time constant of

The L-shaped conductor in moves at across and touches a stationary -shaped conductor in a magnetic field. The two vertices overlap, so that the enclosed area is zero, at . The conductor has a resistance of ohms per meter.
a. What is the direction of the induced current?
b. Find expressions for the induced emf and the induced current as functions of time.
c. Evaluateandat.

A cmcm square loop of wire lies in the -plane with its bottom edge on the -axis. The resistance of the loop is. A magnetic field parallel to the -axis is given by, where is in tesla, in meters, and in seconds. What is the size of the induced current in the loop at ?
86. III High-frequency signals are often transmitted along a coaxial CALC cable, such as the one shown in FIGURE CP30.86. For example, the cable TV hookup coming into your home is a coaxial cable. The signal is carried on a wire of radius while the outer conductor of radius is grounded. A soft, flexible insulating material fills the space between them, and an insulating plastic coating goes around the outside.
a. Find an expression for the inductance per meter of a coaxial cable. To do so, consider the flux through a rectangle of length that spans the gap between the inner and outer conductors.
b. Evaluate the inductance per meter of a cable having and .
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