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Chapter 22: Q6CQ (page 808)
If a charged particle moves in a straight line through some region of space, can you say that the magnetic field in that region is necessarily zero?
Hence, we cannot necessarily say that the force field is zero in this region.
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The force per meter between the two wires of a jumper cable being used to start a stalled car is (a) What is the current in the wires, given they are separated by ? (b) Is the force attractive or repulsive?
Measurements affect the system being measured, such as the current loop in Figure 22.56
(a) Estimate the field the loop creates by calculating the field at the center of a circular loop 20.0 cm in diameter carrying 5.00A
(b) What is the smallest field strength this loop can be used to measure if its field must alter the measured field by less than0.0100%?
The wire carrying 400Ato the motor of a commuter train feels an attractive force ofdue to a parallel wire carrying to a headlight. (a) How far apart are the wires? (b) Are the currents in the same direction?
Repeat Exercise 22.41 but with the loop lying flat on the ground with its current circulating counterclockwise (when viewed from above) in a location where the Earth's field is north, but at an angle below the horizontal and with a strength of.
What is the direction of the magnetic force on the current in each of the six cases in Figure?
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