Physics

The dimensional formulafor the physical quantity $\cfrac {B \mu_0 \epsilon_0}{E}$ is : (E=intensityof electric field, B-magnetic induction and symbols have their usual meaning)

$L^1MT^{-1}$

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Single Correct Medium Published on 18th 08, 2020
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Realted Questions

Q1 Subjective Medium
$M L T ^ { - 2 } = k L ^ { a } \left( L T ^ { - 1 } \right) ^ { b } \left( M L ^ { - 1 } T ^ { - 1 } \right) ^ { c }$
where $k$  is a dimensionless constant. Taking dimensions on both sides,
find value a, b and c

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q2 Single Correct Medium
The physical quantity which has the dimensional formula ${ M }^{ 1 }{ T }^{ -3 }$ is:
• A. surface tension
• B. solar constant
• C. density
• D. compressibility

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q3 Single Correct Medium
Four  positive charges $( 2 \sqrt 2-1 )Q$ are arranged at corner of square . another charge q is placed at the centre of the square. resultant force acting on each corner is zero if q is :
• A. $-7Q/4$
• B. $-4Q/ 7$
• C. $-Q$
• D. $none$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q4 Single Correct Medium
The number of particles crossing the unit area perpendicular to the x-axis per unit time is given by $\displaystyle N = -D \left( \frac {n_2 - n_1} {x_2 - x_1} \right)$ when $n_1$ and $n_2$ are the numbers of particles per unit volume for the values of x meant to be $x_1$ and $x_2$ respectively. What is the dimensional formula for the diffusion constant D ?
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• C. $M^0LT^{-3}$
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Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q5 Subjective Medium
To check the correctness of the relation : $\dfrac{1}{2}mv=mgh$ using the dimensional analysis.

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020