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7. If diameter of a conductor is doubled, the drift velocity of electrons inside it will [ ] a) Be doubled b) Be halved c) Not change - The dimensional formula of current density is d) Be thrice a) [LT-2] b) [ML-³] c) [L-2A] d) [L²A] . With the rise in temperature r.m. s velocity a) Decreases b) Increases

7. If diameter of a conductor is doubled, the drift velocity of electrons inside it will [ ] a) Be doubled b) Be halved c) Not change - The dimensional formula of current density is d) Be thrice a) [LT-2] b) [ML-³] c) [L-2A] d) [L²A] . With the rise in temperature r.m. s velocity a) Decreases b) Increases

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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7. If diameter of a conductor is doubled, the drift velocity of electrons inside it will[ ] a) Be doubled b) Be halved c) Not change | The dimensional formula of current density is d) Be thrice a) [LT-2] b) [ML-³] c) [L-2A] d) [L² A] 9. With the rise in temperature r.m.s velocity a) Decreases b) Increases c) Doesn't change d) may increase or decrease 10. With the rise in temperature, relaxation time a) Increases b) Decreases c) Doesn't change d) May increase or decrease 11. The unit of mobility m d) None m2 a) volt -sec m b) volt -sec c) volt 2 L. When the electric field is zero drift velocity is c) Zero d) None a) Maximum b) Minimum
Transcribed Image Text:7. If diameter of a conductor is doubled, the drift velocity of electrons inside it will[ ] a) Be doubled b) Be halved c) Not change | The dimensional formula of current density is d) Be thrice a) [LT-2] b) [ML-³] c) [L-2A] d) [L² A] 9. With the rise in temperature r.m.s velocity a) Decreases b) Increases c) Doesn't change d) may increase or decrease 10. With the rise in temperature, relaxation time a) Increases b) Decreases c) Doesn't change d) May increase or decrease 11. The unit of mobility m d) None m2 a) volt -sec m b) volt -sec c) volt 2 L. When the electric field is zero drift velocity is c) Zero d) None a) Maximum b) Minimum
2. The direction of current density is same as that of Y a) Current b) Electric field c) Electric potential d) Charge 3. Relation between drift velocity and current I a) V =- b) V c) J = d) V = L n neA A пе 4. Drift velocity will be of the order a) 10-6m/s b) 10-3m/s c) 10° m/s d) 10' m/s 54
Transcribed Image Text:2. The direction of current density is same as that of Y a) Current b) Electric field c) Electric potential d) Charge 3. Relation between drift velocity and current I a) V =- b) V c) J = d) V = L n neA A пе 4. Drift velocity will be of the order a) 10-6m/s b) 10-3m/s c) 10° m/s d) 10' m/s 54
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