Physics

# Which of the following pair of quantities do not have the same dimensions?

Light year, time period

##### SOLUTION

Light year has the dimensions of distance and time period is time.

You're just one step away

Create your Digital Resume For FREE on your name's sub domain "yourname.wcard.io". Register Here!

Single Correct Medium Published on 18th 08, 2020
Questions 244531
Subjects 8
Chapters 125
Enrolled Students 197

#### Realted Questions

Q1 Single Correct Medium
If $P$ represents radiation pressure '$C$' represents speed of light and $Q$ represents radiation energy striking a unit area per second then non-zero integers $x, y$ and $z$ such that ${ P }^{ x }.{ Q }^{ y }.{ C }^{ z }$ is dimensionless are :
• A. $x =1, y =1, z= -1$
• B. $x=1, y= -1, z=1$
• C. $x = -1, y =1, z =1$
• D. $x=1, y=1, z=1$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q2 Subjective Medium
The flux of magnetic field through a closed conducting loop changes with time according to the equation,$\Phi ={ at }^{ 2 }+bt+c$.$(a)$ Write the $SI$ units of $a,b$ and $c$ $(b)$ If the magnitudes of $a,b$ and $c$ are $0\cdot 20, 0.40$ and $0.60$ respectively, find the including emf at $t=2\ s$.

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q3 Single Correct Medium
The electric field in a certain region is given by $\overrightarrow E=( \frac {K}{x^3}) \hat i$. the dimension of K are:-
• A. $MLT^{-3}A^{-1}$
• B. $ML^{-2}T^{-3}A^{-1}$
• C. $ML^4T^{-3}A^{-1}$
• D. $M^0L^0T^0A^0$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q4 Single Correct Medium
If frequency $F$, velocity $V$, and density $D$ are considered fundamental units, the dimensional formula for momentum will be
• A. $DVF^2$
• B. $DV^2F^{-1}$
• C. $D^2V^2F^2$
• D. $DV^4F^{-3}$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q5 Subjective Medium
The distance of a galaxy is $56 \times10^{25}m$. Assume the speed of light to be $3\times10^8 m s^{-1}$. Express order of magnitude of time taken by light travelled to the galaxy.

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020