DIMENSIONS + ERRORS

Is current a fundamental quantity

• yes

• no

If dimension of energy in a system is 'E' .The dimension of work will be?

• E

• ML²T^-2

• E²

Can we calculate the dimensional formula of an equation having more than 3 variable?

• yes

• no

How can gross errors be removed?

• by calculation of zero error

• following the precautions

• careful working of the experimenter.

• increasing the number of observations

a glass plate of length 3.5 cm and width 1.5 cm . what will be the maximum possible error in measuring the area of the plate.

• 0.2 cm²

• 0.6 cm²

• 1.2 cm³

• 0.5 cm²

convert 10 joule into a system of cgs

• 10⁸

• 10⁷

• 10⁹

• 10⁶

if 10 volt reading in a voltmeter has 20 divisions . what is the least count of the voltmeter ?

• 0.10 v

• 0.20 v

• 0.50 v

• 0.5 v

which of the below given reading is most accurate

0.001023 , 0.001230 , 0.00123

• 0.001023

• 0.001230

• 0.00123

The weight of a metallic block in air is quoted as(5.00 ± 0.05) N and that in water is quoted as (4.00 ± 0.05) N. the relative density of the metal would be quoted as :      
r.d. = weight in liquid / weight in air

• 5.00 ± 0.005

• 5.00 ± 0.10

• 5.00 ± 6%

• 5.00 ± 11%

choose the constant which will have dimensions among the following :

• refractive index

• angle

• universal gravitational constant

• relative density