Current Electricity Charging Discharging Of Capacitors Question 357
Question: An electric wire of length ?I? and area of cross-section $ a $ has a resistance R ohms. Another wire of the same material having same length and area of cross-section 4a has a resistance of
[MP PMT 1993]
Options:
A) 4R
B) R/4
C) R/16
D) 16R
Show Answer
Answer:
Correct Answer: B
Solution:
$ R=\frac{\rho l}{a} $ for first wire and R?= $ \frac{\rho l}{4a}=\frac{R}{4} $ for second wire.
BETA
