Physics

# unit of Mass$=\frac{100N}{10m\ 10^{-4}s^{-2}}$now $1$ new unit of mass=? $S.I.$ unit

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Subjective Medium Published on 18th 08, 2020
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#### Realted Questions

Q1 Single Correct Medium
Using mass(M), length (L), time(T), and electric current(A) as fundamental quantities, the dimensions of permittivity will be
• A. $[M LT^{-1}A^{-1}]$
• B. $[M LT^{-2}A^{-2}]$
• C. $[M^{-1} L^{-3}T^{4}A^{2}]$
• D. $[M^2 L^{-2}T^{-2}A]$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q2 Subjective Medium
Let $I=$current through a conductor, $R=$ its resistance and $V=$ potential difference across its ends. According to Ohm's law, product of two of these quantities equals the third. Obtain Ohm's law from dimensional analysis. Dimensional formulae for R and V are $ML^2I^{-2}T^{-3}$ and $ML^2T^{-2}I^{-1}$ respectively.

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q3 Subjective Medium
Give the dimensional formula of intensity of gravitational field.

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q4 Single Correct Medium
The time dependence of a physical quantity $p$ is given by $p=p_0$ exp. $(-\alpha t^2)$, where $\alpha$ is a constant and $t$ is the time. The constant $\alpha$
• A. is dimensionless
• B. has dimensions $T^{-2}$
• C. has dimensions $T^2$
• D. has dimensions of $p$

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q5 Single Correct Medium
Light years is the unit of:
• A. time
• B. length
• C. mass
• D. none of these

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020