Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 34

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Earn 100

Define least count of an instrument. What does the least count error indicate ?

Important Questions on Units and Measurements

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 35

Write the number of significant figures in the following values.

(i) 2.340

(ii) 8.049

(iii) 36000

(iv) 0.0042

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 36

Solve with due regard to significant figures.

6.30 \times 10^{- 3} + 4.2 \times 10^{- 2}

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 37

Round off the following numbers to three significant figures.

(i) 12.132

(ii) 2.1603

(iii) 120.82

(iv) 0.4265

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 39

A boy drops a ball from rest which reaches the ground in

2.1 s .

Find the maximum height from where the ball is dropped to appropriate significant figures.
[given

g = 9.8 m s^{- 2}

]

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 40

Does dimensional consistency ensure the physical correctness of a mathematical equation ?

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 41

What are the dimensional formulae for the quantities having following units ?
(i) electron volt (ii)

kWh

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 42

Can we use dimensional method to find an expression for gravitational force acting between two objects of mass

m_{1}

and

m_{2} ?

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Gamma Question Bank for Medical Physics>Chapter 2 - Units and Measurements>Assignment>Q 43

The viscous force acting between liquid layers of area $A$ is given as $F = - η A \frac{d v}{d x}$ .

If $d v$ has dimensions of speed and $d x$ has dimensions of distance, find the dimensions of coefficient of viscosity $η .$