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PHY250H1S
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Lecture 21
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Pre-class Quiz
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Pre-class Quiz
Read: Griffiths 7.1.2-7.1.3
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Question 1
A certain wire has a resistance R.
What is the resistance of a second wire , made of the same material, that is half as long and has half the diameter?
a) 2R
b) R/2
c) 4R
d) R/4
Question 2
The figure shows the current i in a single loop circuit with a battery B and a resistance R.
Wires have negligible resistance.
Where among the points a, b, c is the greatest electric potential energy of the charge carriers?
1) at point a
2) at point b
3) at point c
Justify your reasoning:
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Lecture 21
Pre-class Quiz
L21_Q2