The potential gradient along the length of a uniform wire is 10 volt/metre. B and C are the two points at 30 cm and 60 cm point on a meter scale fitted along the wire. The potential difference between B and c will be
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a
3 volt
b
0.4 volt
c
7 volt
d
4 volt
answer is A.
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Detailed Solution
Potential gradient = Change in voltage per unit length∴ 10 =V2 −V130/100 ⇒ V2 −V1 =3 volt
The potential gradient along the length of a uniform wire is 10 volt/metre. B and C are the two points at 30 cm and 60 cm point on a meter scale fitted along the wire. The potential difference between B and c will be