Physics

# In the context of accuracy to measurement and significant figures in expressing results of experiment, which of the following is/are correct?(1) Out of the measurements 50.14 cm and 0.00025 ampere, the first one has greater accuracy.(2) If one travels 478 km by rail and 397 m. by road, the total distance traveled is 478 km.

Both are correct

##### SOLUTION
Since for $50.14cm$
Now, the significant number$=4$
and for$0.00025$
Significant number $=2$
Both are correct

You're just one step away

Single Correct Medium Published on 18th 08, 2020
Questions 244531
Subjects 8
Chapters 125
Enrolled Students 202

#### Realted Questions

Q1 Single Correct Medium
If the percentage error in the measurement of velocity of a particle 50% then the percentage error in the measurement of its kinetic energy will be
• A. 225%
• B. 125%
• C. 100%
• D. 200%

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q2 Single Correct Medium
Which of the following do not have the same dimensional formula as the velocity?
(Given that $\mu_0=$ permeability of free space, $\epsilon_0=$ permittivity of free space, $v=$ frequency, $\lambda=$ wavelength, $P=$pressure, $\rho=$density, $\omega=$ angular frequency, $k=$ wave number}
• A. $\dfrac{1}{\sqrt {\mu_o\epsilon_o}}$
• B. $v\lambda$
• C. $\sqrt {P/\rho}$
• D. $\omega k$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q3 Single Correct Medium
fermi is equal to
• A. $\displaystyle { 10 }^{ -15 }$m
• B. $\displaystyle { 10 }^{ 15 }$m
• C. $\displaystyle { 10 }^{ -12 }$m
• D. $\displaystyle { 10 }^{ 12 }$m

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q4 Single Correct Medium
The frequency of vibration of a string is given by $v=\dfrac { p }{ 2l } \left[ \dfrac { F }{ m } \right] ^{ \frac { 1 }{ 2 } }$.
Here $p$ is the number of segments in which the string is divided, $F$ is the tension in the string and $l$ is its length. The dimensional formula for $m$ is:
• A. ${ M }^{ 0 }{ L }^{ 0 }{ T }^{ 0 }$
• B. ${ ML }^{ -1 }{ T }^{ 0 }$
• C. ${ ML }^{ 0 }{ T }^{ -1 }$
• D. ${ M }^{ 0 }{ LT }^{ -1 }$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q5 Subjective Medium
The wavelength of light of a particular colour is 5800 $\mathring{A}$. What is its order of magnitude in meter?

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020