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
Chapter11: Magnetic Forces And Fields
Section: Chapter Questions
Problem 51P: A charged particle moves through a velocity selector at constant velocity. In tire selector,...
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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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F05435b15-53da-4512-9c41-fda78ee82101%2F68bb8436-0f4e-4e0d-9734-3f84af1351ab%2F3wuf4u_processed.jpeg&w=3840&q=75)
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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F05435b15-53da-4512-9c41-fda78ee82101%2F68bb8436-0f4e-4e0d-9734-3f84af1351ab%2F2wtmw6_processed.jpeg&w=3840&q=75)
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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