***WILL GIVE LIFESAVER RATING FOR CORRECT ANSWER***!!!!!!!! A Nichrome wire 95 c

Question

***WILL GIVE LIFESAVER RATING FOR CORRECT ANSWER***!!!!!!!! A Nichrome wire 95 cm long and 0.25 mm in diameter isconnected to a 1.3 volt flashlight battery. What is theelectric field inside the wire? ___________ V/m The Nichrome wire is replaced by a wire of the same length anddiameter, and same mobile electron density but with electronmobility 3 times as large as that of Nichrome. Now what isthe electric field inside the wire? ___________ V/m B. Not enough information is given to compare the twocurrents. D.

Explanation / Answer

1. E = emf/L = 1.3V/0.95 m = 1.37 V/m 2. E = emf/L = 1.3V/0.95 m = 1.37 V/m (this is not a mistake) 3. A. i2 > i1. If electric field is constant, but the electronmobility increases, electron current has to increase.

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