If your flashlight battery has an internal resistance of about one-quarter ohm, and your bar magnet produces a magnetic field of about 0.1 tesla near one end of the magnet, what is the approximate...

If your flashlight battery has an internal resistance of about one-quarter ohm, and your bar magnet produces a magnetic

field of about 0.1 tesla near one end of the magnet, what is the approximate magnitude of the magnetic force on 5

centimeters of a wire that short-circuits the battery? (Figure 21.92) Indicate the direction of this force on a diagram. Check

your direction experimentally

21.P.49 A Nichrome wire has the shape of two quarter-circles of radius a and b, connected by straight sections as shown in Figure 21.93. The wire carries conventional current I in the direction shown.