If the Potential Difference V Applied Across a Conductor is Increased to 2V | Bzziii

If the potential difference V applied across a conductor is increased to 2V with its temperature kept constant, free electrons in a conductor 

(i) remain the same 
(ii) become half of its previous value 
(iii) be double of its initial value 
(iv) become zero. 

(iii) be double of its initial value 

Explanation:

If the potential difference V applied across a conductor is increased to 2V with its temperature kept constant, free electrons in a conductor be double of its initial value .

`"V"_{"d"}`=`\frac{"eE"}{"ml"}\bar{\tau}`

= `e\frac{"V"}{"ml"}\bar{\tau}`

If temperature is kept constant, relaxation time `\bar{t}`- will remain constant, and e, m are also constants.

`"V"_{"d"}"a V"`

`"V"_{"d"}"a 2V"`

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CBSE Class 12 Physics Sample Paper-2022