(a) Calculate the resistance per unit length of a 44 gauge nichrome wire of radius 0.642 mm. 22/m I = (b) If a potential difference of 12.0 V is maintained across a 1.00 m length of wire, what is the current in the wire? A (c) The wire is melted down and recast with triple its original length. Find the new resistance R as a multiple of the old resistance Ro. Ro EXERCISE GETTING STARTED | I'M STUCK! What is the resistance of a 5.6 m length of nichrome wire that has a radius of 0.321 mm? How much current does it carry when connected to a 120 V source? R = 22 A HINTS:
(a) Calculate the resistance per unit length of a 44 gauge nichrome wire of radius 0.642 mm. 22/m I = (b) If a potential difference of 12.0 V is maintained across a 1.00 m length of wire, what is the current in the wire? A (c) The wire is melted down and recast with triple its original length. Find the new resistance R as a multiple of the old resistance Ro. Ro EXERCISE GETTING STARTED | I'M STUCK! What is the resistance of a 5.6 m length of nichrome wire that has a radius of 0.321 mm? How much current does it carry when connected to a 120 V source? R = 22 A HINTS:
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Transcribed Image Text:(a) Calculate the resistance per unit length of a 44 gauge nichrome wire of radius 0.642 mm.
22/m
I =
(b) If a potential difference of 12.0 V is maintained across a 1.00 m length of wire, what is the
current in the wire?
A
(c) The wire is melted down and recast with triple its original length. Find the new resistance R
as a multiple of the old resistance Ro.
Ro
EXERCISE
HINTS: GETTING STARTED | I'M STUCK!
What is the resistance of a 5.6 m length of nichrome wire that has a radius of 0.321 mm? How much
current does it carry when connected to a 120 V source?
R =
22
A
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