Q: Two closed loops A and C are close to a long wire
Two closed loops A and C are close to a long wire carrying a current I (Fig. E29.17). Fig. E29.17: (a). Find the direction (clockwise or counterclockwise) of the current induced in each loop if I...
See AnswerQ: A thin, 50.0-cm-long metal bar
A thin, 50.0-cm-long metal bar with mass 750 g rests on, but is not attached to, two metallic supports in a uniform 0.450-T magnetic field, as shown in Fig. E27.37. A battery and a 25.0-Ω...
See AnswerQ: The magnetic force acting on a charged particle can never do work
The magnetic force acting on a charged particle can never do work because at every instant the force is perpendicular to the velocity. The torque exerted by a magnetic field can do work on a current l...
See AnswerQ: A rectangle measuring 30.0 cm by 40.0 cm
A rectangle measuring 30.0 cm by 40.0 cm is located inside a region of a spatially uniform magnetic field of 1.25 T, with the field perpendicular to the plane of the coil (Fig. E29.26). The coil is pu...
See AnswerQ: The conducting rod ab shown in Fig. E29.29 makes
The conducting rod ab shown in Fig. E29.29 makes contact with metal rails ca and db. The apparatus is in a uniform magnetic field of 0.800 T, perpendicular to the plane of the figure. Fig. E29.29:...
See AnswerQ: A 0.650-m-long metal bar is pulled
A 0.650-m-long metal bar is pulled to the right at a steady 5.0 m/s perpendicular to a uniform, 0.750-T magnetic field. The bar rides on parallel metal rails connected through a 25.0-â„&brv...
See AnswerQ: A 0.360-m-long metal bar is pulled
A 0.360-m-long metal bar is pulled to the left by an applied force F. The bar rides on parallel metal rails connected through a 45.0- Ω resistor, as shown in Fig. E29.31, so the ap...
See AnswerQ: Consider the circuit shown in Fig. E29.31, but
Consider the circuit shown in Fig. E29.31, but with the bar moving to the right with speed v. As in Exercise 29.31, the bar has length 0.360 m, R = 45.0 Ω, and B = 0.650 T. Exerc...
See AnswerQ: A 0.250-m-long bar moves on parallel
A 0.250-m-long bar moves on parallel rails that are connected through a 6.00-Ω resistor, as shown in Fig. E29.33, so the apparatus makes a complete circuit. You can ignore the resi...
See AnswerQ: Blood contains positive and negative ions and thus is a conductor.
Blood contains positive and negative ions and thus is a conductor. A blood vessel, therefore, can be viewed as an electrical wire. We can even picture the flowing blood as a series of parallel conduct...
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