An element of an electric fire is made up from a length of nichrome wire of diameter
Question:
An element of an electric fire is made up from a length of nichrome wire of diameter 0.40 mm and length 5.0 m. The resistance of this element is R1. Another element, also made from nichrome, for a different electric fire, has a length of 2.0 m and a diameter of 0.20 mm. This element has a resistance of R2. What is the relationship between R1 and R2?
A. R2 = 0.80 R1
B. R2 = 1.6 R1
C. R2 = 5.0 R1
D. R2 = 10 R1
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Related Book For 
Cambridge International AS And A Level Physics Coursebook
ISBN: 9781108859035
3rd Edition
Authors: David Sang, Graham Jones, Gurinder Chadha, Richard Woodside
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