Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 26

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In an experiment to measure the diameter of a wire using a screw gauge of resolution $0.001 cm$ , which of the following may correctly represent the measurement?

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Important Questions on Physical World, Units and Measurement

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Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 27

The breadth of a rectangular sheet is measured as

10.1 cm

. The error in the measurement is

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Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 28

The length of a rod is measured by four different instruments and the measurements are reported as

A. $500.0 mm$
B. $50.0 cm$
C. $0.500 m$
D. $5.0 \times 10^{- 4} km$
We can conclude that

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Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 30

The period of oscillation of a simple pendulum in the experiment is recorded as

2.63 s

,

2.56 s

,

2.42 s

,

2.71 s

and

2.80 s

, respectively. The average absolute error is

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Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 31

A measured value

0.00274

expressed in two significant digits is

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Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 32

The number of significant figures in the number

0.010780 \times 10^{- 3}

are

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Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 33

0.205 - 0.2014

can be expressed as

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Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 34

If speed of light is

3.00 \times 10^{8} {ms}^{- 1}

and

1

year

= 365.25

days, then

1

light year is

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Gamma Question Bank for Engineering Physics>Chapter 1 - Physical World, Units and Measurement>Assignment>Q 35

A physical quantity '

Y

is represented by formula

Y = \frac{A^{x} B^{y}}{C^{z}} .

If maximum possible percentage errors in

A, B

and

C

respectively are

a %, b %

and

c %

then final maximum possible error is