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
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter22: Magnetism
Section: Chapter Questions
Problem 71PE: What current is needed in the top wire in Figure 22.58(a) to produce a field of zero at the point...
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