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# The magnitude of any physical quantity: 1. depends on the method of measurement. 2. does not depend on the method of measurement. 3. is more in the SI system than in the CGS system. 4. is directly proportional to the fundamental units of mass, length and time.

Subtopic:  Dimensions |
From NCERT
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Which of the following is not equal to a watt?
1. Joule/second
2. Ampere$$\times$$ volt
3. (Ampere)2$$\times$$ ohm
4. Ampere/volt

Subtopic:  Dimensions |
From NCERT
PMT - 1990
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Newton–second is the unit of

(1) Velocity

(2) Angular momentum

(3) Momentum

(4) Energy

Subtopic:  Dimensions |
From NCERT
PMT - 1984
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Which of the following is not represented in correct unit

(1) $\frac{\text{Stress}}{\text{Strain}}=N\text{​}/\text{​}{m}^{2}$

(2) Surface tension = $N\text{​}/\text{​}m$

(3) Energy $=kg\text{​-​}m\text{​}/\text{​}\mathrm{sec}$

(4) Pressure $=N\text{​}/\text{​}{m}^{2}$

Subtopic:  Dimensions |
59%
From NCERT
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One second is equal to :

(1) 1650763.73 time periods of $Kr$ clock

(2) 652189.63 time periods of $Kr$ clock

(3) 1650763.73 time periods of $Cs$ clock

(4) 9192631770 time periods of $Cs$ clock

Subtopic:  Dimensions |
From NCERT
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One nanometre is equal to:

(1) ${10}^{9}mm$

(2) ${10}^{-6}\text{\hspace{0.17em}}cm$

(3) ${10}^{-7}cm$

(4) ${10}^{-9}cm$

Subtopic:  Dimensions |
From NCERT
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A micron is related to centimetre as

(1) $1\text{\hspace{0.17em}}micron={10}^{-8}cm$

(2) $1\text{\hspace{0.17em}}micron={10}^{-6}cm$

(3) $1\text{\hspace{0.17em}}micron={10}^{-5}cm$

(4) $1\text{\hspace{0.17em}}micron={10}^{-4}\text{\hspace{0.17em}}cm$

Subtopic:  Dimensions |
From NCERT
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The unit of power is :

(1) Joule

(2) Joule per second only

(3) Joule per second and watt both

(4) Only watt

Subtopic:  Dimensions |
65%
From NCERT
PMT - 1985
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A suitable unit for gravitational constant is:

(1) $kg\text{-\hspace{0.17em}}m{\mathrm{sec}}^{-1}$

(2) $N\text{\hspace{0.17em}}{m}^{-1}\mathrm{sec}$

(3) $N\text{\hspace{0.17em}\hspace{0.17em}}{m}^{2}\text{\hspace{0.17em}}k{g}^{-2}$

(4) $kg\text{\hspace{0.17em}}m\text{\hspace{0.17em}}{\mathrm{sec}}^{-1}$

Subtopic:  Dimensions |
76%
From NCERT
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SI unit of pressure is

(1) Pascal

(2) $Dynes/c{m}^{2}$

(3) cm of Hg

(4) Atmosphere

Subtopic:  Dimensions |
80%
From NCERT
PMT - 1984
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