An Infinite Current Sheet . Long, straight conductors with square cross sections and each carrying current I are laid side by side to form an infinite current sheet ( Fig. P28.73 ). The conductors lie in the xy -plane, are parallel to the y -axis, and carry current in the + y -direction. There are n conductors per unit length measured along the x -axis. (a) What are the magnitude and direction of the magnetic field a distance a below the current sheet? (b) What are the magnitude and direction of the magnetic field a distance a above the current sheet? Figure P28.73
An Infinite Current Sheet . Long, straight conductors with square cross sections and each carrying current I are laid side by side to form an infinite current sheet ( Fig. P28.73 ). The conductors lie in the xy -plane, are parallel to the y -axis, and carry current in the + y -direction. There are n conductors per unit length measured along the x -axis. (a) What are the magnitude and direction of the magnetic field a distance a below the current sheet? (b) What are the magnitude and direction of the magnetic field a distance a above the current sheet? Figure P28.73
An Infinite Current Sheet. Long, straight conductors with square cross sections and each carrying current I are laid side by side to form an infinite current sheet (Fig. P28.73). The conductors lie in the xy-plane, are parallel to the y-axis, and carry current in the +y-direction. There are n conductors per unit length measured along the x-axis. (a) What are the magnitude and direction of the magnetic field a distance a below the current sheet? (b) What are the magnitude and direction of the magnetic field a distance a above the current sheet?
A cart on wheels (assume frictionless) with a mass of 20 kg is pulled rightward with a 50N force. What is its acceleration?
Two-point charges of 5.00 µC and -3.00 µC are placed 0.250 m apart.a) What is the electric force on each charge? Include strength and direction and a sketch.b) What would be the magnitude of the force if both charges are positive? How about the direction?
c) What will happen to the electric force on each piece of charge if they are moved twice as far apart? (Give a numerical answer as well as an explanation.)
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