Current Electricity Charging Discharging Of Capacitors Question 338
Question: When a piece of aluminium wire of finite length is drawn through a series of dies to reduce its diameter to half its original value, its resistance will become
[NCERT 1974; AIIMS 1997; MH CET 2000; UPSEAT 2001; CBSE PMT 2002]
Options:
A) Two times
B) Four times
C) Eight times
D) Sixteen times
Show Answer
Answer:
Correct Answer: D
Solution:
In stretching of wire $ R\propto \frac{1}{r^{4}} $
BETA
