JEE Main 2021 (Online) 27th August Evening Shift | Units & Measurements Question 53 | Physics | JEE Main - ExamSIDE.com

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1

JEE Main 2021 (Online) 27th August Evening Shift

MCQ (Single Correct Answer)

+4

-1

Match List - I with List - II.

	List - I		List - II
(a)	$${R_H}$$ (Rydberg constant)	(i)	$$kg\,{m^{ - 1}}{s^{ - 1}}$$
(b)	h (Planck's constant)	(ii)	$$kg\,{m^2}{s^{ - 1}}$$
(c)	$${\mu _B}$$ (Magnetic field energy density)	(iii)	$$\,{m^{ - 1}}$$
(d)	$$\eta $$ (coefficient of viscocity)	(iv)	$$kg\,{m^{ - 1}}{s^{ - 2}}$$

Choose the most appropriate answer from the options given below :

A

(a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)

B

(a)-(iii), (b)-(ii), (c)-(iv), (d)-(i)

C

(a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)

D

(a)-(iii), (b)-(ii), (c)-(i), (d)-(iv)

2

JEE Main 2021 (Online) 27th August Evening Shift

MCQ (Single Correct Answer)

+4

-1

If force (F), length (L) and time (T) are taken as the fundamental quantities. Then what will be the dimension of density :

A

[FL^$$-$$4T²]

B

[FL^$$-$$3T²]

C

[FL^$$-$$5T²]

D

[FL^$$-$$3T³]

3

JEE Main 2021 (Online) 27th August Morning Shift

MCQ (Single Correct Answer)

+4

-1

Which of the following is not a dimensionless quantity?

A

Relative magnetic permeability ($$\mu$$_r)

B

Power factor

C

Permeability of free space ($$\mu$$₀)

D

Quality factor

4

JEE Main 2021 (Online) 27th August Morning Shift

MCQ (Single Correct Answer)

+4

-1

If E and H represents the intensity of electric field and magnetising field respectively, then the unit of E/H will be :

A

ohm

B

mho

C

joule

D

newton

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