Electricity and magnetism

11

Subash ·2009-03-24 07:02:11

b,

answer is b edited

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vector ·2009-03-24 07:05:25

no

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11

Subash ·2009-03-24 07:07:23

is it straight or multiple correct?

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vector ·2009-03-24 07:08:38

multiple crrct however the ans is a single option

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11

Subash ·2009-03-24 07:09:37

oh sorry answer is b then ?

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1

skygirl ·2009-03-24 07:13:13

d ?

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vector ·2009-03-24 07:14:25

ya sky u r right cud u explain the thing

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1

skygirl ·2009-03-24 07:20:11

a) drift speed depends upon average collision time... which decrease with inc in temp.

b) resistivity decreases.

c) so does resistance.. (decreaess in a conductor)

R = R_O[1-kÎ”t] and R=Ïl/A

d) no of free electrons in a conductor will remain same with rise in temp. only the no of collisions between them increase.

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vector ·2009-03-24 07:24:33

@sky resistance n resistivity increases on increasing temp in conductor

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