Physics

# If two quantities have same dimensions, do they represent the same physical content? A dimensionally correct equation need not actually be a correct equation need not actually  be a correct equation but dimensionally incorrect equation is necessarily wrong. Justify.

##### SOLUTION

You're just one step away

Subjective Medium Published on 18th 08, 2020
Questions 244531
Subjects 8
Chapters 125
Enrolled Students 204

#### Realted Questions

Q1 Single Correct Medium
The resistance $R=\dfrac{V}{I}$ where $V=(100\pm 5)V$ and $I=(10\pm 0.2)A$. The percentage error in R is?
• A. $5.2\%$
• B. $4.8\%$
• C. $7\%$
• D. $3\%$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q2 Single Correct Medium
Match the Following:
 Column - I Column - II A Weight p Scalar B Mass q Vector C Force r kilogram D Quantity of matter in a body s Kgwt (or) kgf

• A. A-q,s; B-p,r; C-q,s; D-p,r
• B. A-r,s; B-p,q; C-q,s; D-p,r
• C. A-q,s; B-p,r; C-q,r; D-p,s
• D. A-q,s; B-p,s; C-q,r; D-p,r

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q3 Single Correct Medium
What is the approximation made in the parallax method?
• A. All distances measured between two points on earth is zero.
• B. All distances measured between two points on earth is constant.
• C. Distance between a point on the earth and the planet is very large as compared to the distance between two points on earth's surface.
• D. No approximation is made.

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q4 Subjective Medium
Equation $\displaystyle s_{t}=u+at-\frac{1}{2}$a does not seem dimensionally correct, why?

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q5 Subjective Medium
Name the three convenient units used to measure length ranging from very short to very long value. How are they related to the S.I. unit?

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020