Current Electricity Charging Discharging Of Capacitors Question 284
Question: A 10 m long wire of 20W resistance is connected with a battery of 3 volt e.m.f. (negligible internal resistance) and a 10 W resistance is joined to it is series. Potential gradient along wire in volt per meter is
[MP PMT 2003]
Options:
A) 0.02
B) 0.3
C) 0.2
D) 1.3
Show Answer
Answer:
Correct Answer: C
Solution:
Potential gradient $ x=\frac{e}{(R+R _{h}+r)}.\frac{R}{L} $
$ =\frac{3}{(20+10+0)}\times \frac{20}{10}=0.2 $
BETA
