What is the maximum current that flows in the thread during this experiment if the voltage source is a 9-V battery?

(a) About 1 A;

(b) About 0.1 A;

(c) About 1 µA;

(d) about 1 nA.

Some types of spiders build webs that consist of threads made of dry silk coated with a solution of a variety of compounds. This coating leaves the threads, which are used to capture prey, hygroscopic that is, they attract water from the atmosphere. It has been hypothesized that this aqueous coating makes the threads good electrical conductors. To test the electrical properties of coated thread, researchers placed a 5-mm length of thread between two electrical contacts. The researchers stretched the thread in 1-mm increments to more than twice its original length, and then allowed it to return to its original length, again in 1-mm increments. Some of the resistance measurements are shown in the table:

Transcribed Image Text:

Resistance of thread (10° 2) Length of thread (mm) 41 50 76 9. 19 63 102 24 9 11 9. 13 9,