A wire 
has a resistance of 
. Another wire 
of same material but length twice that of 
has resistance of 
. If 
is the radius of cross-section of 
, the radius of cross-section of 
is
a)
b)
c)
d)
A wire has a resistance of . Another wire of same material but length twice that of has resistance of . If is the radius of cross-section of , the radius of cross-section of is
a)
b)
c)
d)
Question ID - 150504 | SaraNextGen Top Answer
A wire has a resistance of . Another wire of same material but length twice that of has resistance of . If is the radius of cross-section of , the radius of cross-section of is
a)
b)
c)
d)
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A wire |
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b) |
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c) |
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d) |
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1 Answer
127 votes
Answer Key / Explanation : (c) -
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(c) Resistance, R For wire P, Similarly for wire Q,
Dividing Eq.(i) by Eq. (ii), we have
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127 votes
Answer Link
127