The document Unit & Dimensions Vectors(Part- 1) - Physics, Solution by DC Pandey NEET Notes | EduRev is a part of the NEET Course DC Pandey (Questions & Solutions) of Physics: NEET.

All you need of NEET at this link: NEET

**Section-I****Single Correct Option****Ques 1: Which one of the following has the dimensions of pressure? ****(a) [ML ^{-2}T^{-2}] **

âˆ´

= [ML

Option (d) is correct.

W = I

âˆ´

âˆ´

Using Eq. (i)

[R] = [L]/[T]

i.e., [T] = [L/R]

Option (c) is correct.

F= 6Ï€ Î·av

âˆ´

Option (d) is correct.**Ques 4: The dimensional formula for magnetic flux is****(a) [ML ^{2}T ^{-2}A^{-1}] **

Ï† = Li

âˆ´ [Ï†] = [L] [i]

=[ML

=[ML

Option (a) is correct.

Linear impulse (I) = F Ã— Î”t

[I ] = [MLT

= [MLT

Option (c) is correct.

Option (c) is correct.

Option (c) is correct.

Option (c) is correct.

Option (c) is correct.

Angular momentum (J) = nh/2Ï€

[J] = [h] = [ML

Option (b) is correct.

= -[M] [LT

âˆ´ [Mass] = [Ev

Option (c) is correct.

âˆ´

= [ML

Option (b) is correct.

âˆ´

Option (b) is correct.

[Velocity gradient]

= [T

= [M

Option (a) is correct.

Sol: Coefficient of friction (Î¼)

âˆ´ [Î¼] = [M

Option (b) is correct.

and V = iR

âˆ´ q = iCR

it = iCR

â‡’ [CR] = [t] = [M

Option (a) is correct.

(a) coulomb/newton-metre

**Sol: **

âˆ´ Unit of Îµ_{0} = Newton-metre^{2} /coulomb^{2}.

Option (b) is correct.**Ques 19: The ratio of the dimensions of Planckâ€™s constant and that of the moment of inertia is the dimension of ****(a) frequency ****(b) velocity ****(c) angular momentum ****(d) time****Ans:** frequency** ****Sol: **Angular momentum (J) = nh/2Ï€

âˆ´

Option (a) is correct.**Ques 20: The velocity v of a particle at time t is given by ****where a, b and c are constants. The dimensions of a, b and c are respectively****(a) [LT ^{-2}], [L] and [T](b) [L^{2}], [T] and [LT^{2}](c) [LT^{2}], [LT] and [L](d) [L], [LT] and [T^{2}]**

[c] = [T]

or [b] = [LT

[at] = [v] = [LT

â‡’ [a] = [LT

Option (a) is correct.

(b) The unit of Î», is same as that of x but not of A

(c) The unit of c is same as that of 2Ï€/Î»

(d) The unit of (ct - x) is same as that of 2Ï€/Î»

âˆ´

Further, y = A sinÎ¸

âˆ´ [A] = [y] = [L]

Option (a) is correct.

âˆ´ X is resistance. [âˆ´W = i

(a)

(b)

(c)

(d)

(d) 0.39

Sol:

Option (b) is correct.

Option (d) is correct.

Option (d) is correct.

Option (d) is correct.

âˆ´

= 7.5

Option (b) is correct.

Sol:

âˆ´

or

or

or

or

or cos Î¸ = 0

or Î¸ = Ï€/2

Option (d) is correct.

Offer running on EduRev: __Apply code STAYHOME200__ to get INR 200 off on our premium plan EduRev Infinity!