Units and Measurement
Get insights from 125 questions on Units and Measurement, answered by students, alumni, and experts. You may also ask and answer any question you like about Units and Measurement
- 125
Questions
- 0
Discussions
- 0
Active Users
- 2
Followers
Have a question about Units and Measurement? Ask our experts
Keep it short & simple. Type complete word. Avoid abusive language.
A vernier caliper has 10 main scale divisions coinciding with 11 vernier scale divisions. 1 main scale division equals 5 mm. The least count of the device is
A vernier caliper has 10 main scale divisions coinciding with 11 vernier scale divisions. 1 main scale division equals 5 mm. The least count of the device is
10 M = 11 V
Þ 1V =
Þ LC = |M – V|
=
Upvote 
If force (F), mass (M), length (L) are taken as fundamental quantities, dimensions of time will be
If force (F), mass (M), length (L) are taken as fundamental quantities, dimensions of time will be
F = Ma = ML T2
-> T2 = ML/F
F
Upvote In which of the following numerical values, all zeroes are significant?
In which of the following numerical values, all zeroes are significant?
In a number without decimal, trailing zeros are insignificant. If a number has a decimal, then preceding zeros are insignificant.
Hence, in 40.40 all zeros are significant
Upvote Match the following.
(a)
Temperature
(p)
Light Year
(b)
Mass
(q)
Shake
(c)
Length
(r)
Fahrenheit
(d)
Time
(s)
Atomic mass unit
Match the following.
|
(a) |
Temperature |
(p) |
Light Year |
|
(b) |
Mass |
(q) |
Shake |
|
(c) |
Length |
(r) |
Fahrenheit |
|
(d) |
Time |
(s) |
Atomic mass unit |
Unit of temperature is Fahrenheit
Unit of mass is atomic mass of unit
Unit of length is light year
Unit of time is shake
Upvote In a measurement, a choice change of different units
In a measurement, a choice change of different units
In a measurement, a choice of change of different units does not change the number of significant figures.
Upvote In which of the following numerical values, all zeroes are significant?
In which of the following numerical values, all zeroes are significant?
In a number without decimal, trailing zeros are insignificant. If a number has a decimal, then preceding zeros are insignificant.
Hence, in 40.40 all zeros are significant
Upvote If force (F), mass (M), length (L) are taken as fundamental quantities, dimensions of time will be
If force (F), mass (M), length (L) are taken as fundamental quantities, dimensions of time will be
Two rods with lengths 20.123 cm and 18.1 cm are placed side by side. The difference in their lengths is
Two rods with lengths 20.123 cm and 18.1 cm are placed side by side. The difference in their lengths is
(b) L1= Length of rod =20.123cm
L2= Length of rod = 18.1cm
Difference in length 
= 20.123-18.1
=2.0 cm
Upvote The pitch of the screw gauge is 1mm and there are 100 divisions on the circular scale. When nothing is put in between the jaws, the zero of the circular scale lies 8 divisions below the reference line. When a wire is placed between the jaws, the first linear scale division is clearly visible while 72nd division on circular scale coincides with the reference line, The radius of the wire is:
The pitch of the screw gauge is 1mm and there are 100 divisions on the circular scale. When nothing is put in between the jaws, the zero of the circular scale lies 8 divisions below the reference line. When a wire is placed between the jaws, the first linear scale division is clearly visible while 72nd division on circular scale coincides with the reference line, The radius of the wire is:
Zero error = +0.08 mm.
Diameter = 1 + 72 * 0.01 – 0.08 = 1.64 mm
Radius = 0.82 mm
Upvote The period of oscillation of a simple pendulum is Measured value of ‘L’ is 1.0m from meter scale having a minimum division of 1mm and time of one-complete oscillation is 1.95s measured from stopwatch of 0.01s resolution. The percentage error in the determination of ‘g’ will be:
The period of oscillation of a simple pendulum is Measured value of ‘L’ is 1.0m from meter scale having a minimum division of 1mm and time of one-complete oscillation is 1.95s measured from stopwatch of 0.01s resolution. The percentage error in the determination of ‘g’ will be: