MEDIUM
11th CBSE
IMPORTANT
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Which of the following pairs of physical quantities does not have same dimensional formula?

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Important Questions on Units and Measurement

HARD
11th CBSE
IMPORTANT

Measure of two quantities along with the precision of respective measuring instrument isA=2.5 m s-1±0.5 m s-1 and B=0.10 s±0.01 s.

Find the value of AB will be

MEDIUM
11th CBSE
IMPORTANT
You measures two quantities as A=(1.0±0.2)m,B=2.0m±0.2m. we report correct value of AB as:
EASY
11th CBSE
IMPORTANT
Which of the following measurement is most precise?
MEDIUM
11th CBSE
IMPORTANT
The mean length of an object is 5cm. Which of the following measurement is most accurate?
MEDIUM
11th CBSE
IMPORTANT
Young's modulus of steel is 1.9×1011N/m2. When expressed in CGS units of dyne/cm2. It will be equal to1N=105 dynes, and 1 m2=104 cm2.
MEDIUM
11th CBSE
IMPORTANT
If the momentum (P), area (A) and time (T) are taken to be fundamental quantities, then energy has dimensional formula.
MEDIUM
11th CBSE
IMPORTANT
On the basis of dimensions, decide which of the following relations for the displacement of particle undergoing simple harmonic motion is not correct.
MEDIUM
11th CBSE
IMPORTANT
P, Q, R are physical quantities, having different dimensions, which of the following combinations can never be a meaningful quantity?