पोटेंशियल डिफरेंस वीएस अप्लाई टो कंडक्टर लेंथ एंड डायमीटर हाउ आर द इलेक्ट्रिक फील्ड ड्रिफ्ट वेलोसिटी वी डी एंड रेजिस्टेंस आर ए फैक्टर व्हेन वी इज द वर्ल्ड इज द वर्ल्ड एंड डी इज द वर्ल्ड
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PHYSICS
A potential difference is applied across the ends of a metallic wire. If the potential difference is doubled, the drift velocity will
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Drift velocity is directly proportional to potential difference.
Drift velocity is defined as the average velocity with which free electrons get drifted towards the positive end of the conductor under the influence of an external electric field.
Drift velocity is given by
v
d
=
m
eEτ
But, E=
l
V
(if l is length of the conductor and V is constant potential difference applied across the ends of the conductor)
∴v
d
=
ml
eVτ
⇒v
d
∝V
So, when the potential difference is doubled the drift velocity will be doubled.
Note - Current flowing through a conductor is directly proportional to the drift velocity.
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toppr
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