Physics

# N divisions on the main scale of vernier callipers coincide with (N+1) divisions on the vernier scale. If each divisions on the main scale of a units, determine the least count of instrument.

$(N+1)^{-1}$ Main scale divisions

##### SOLUTION
Given (N+1) V $=$ NS
LC $=$ 1 MSD - 1 VSD
$= S \displaystyle - \frac{NS}{(N+1)} = \frac{S}{(N+1)}$
$= (N+1)^{-1}$ main scale divisions

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 198

#### Realted Questions

Q1 Subjective Medium
In resonance tube experiment, the velocity of sound is given by $v = 2f_0(l_1 - l_1).$ We found $l_1 = 25.0 cm$ and $l_2 = 75.0 cm$. If there is no error in frequency, what will be the maximum permissible error in the speed of sound? $(Take f_0 = 325 Hz)$

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
Round the following number to $2$ significant digits.
$84.16$.

Asked in: Physics - Units and Measurement

1 Verified Answer | Published on 18th 08, 2020

Q4 Single Correct Hard
The speed of light ($c$), gravitational constant ($G$) and Planck's constant ($h$) are taken as fundamental units in a system. The dimensions of time in this new system should be
• A. $G^{1/2} h^{1/2} c^{-5/2}$
• B. $G^{-1/2} h^{1/2} c^{1/2}$
• C. $G^{1/2} h^{1/2} c^{-3/2}$
• D. $G^{1/2} h^{1/2} c^{1/2}$

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