Beta Question Bank for Engineering: Physics>Chapter 3 - Physical World and Measurement>Exercise-1>Q 25

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If the error in measuring diameter of a circle is $4 %$ , the error in the circumference of the circle will be

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Important Questions on Physical World and Measurement

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Beta Question Bank for Engineering: Physics>Chapter 3 - Physical World and Measurement>Exercise-1>Q 26

A wire has a mass

(0 .3 \pm 0 .003) g

, radius

(0.5 \pm 0 .005) mm

and length

(6 \pm 0 .06) cm

. The maximum percentage error in the measurement of its density is

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Beta Question Bank for Engineering: Physics>Chapter 3 - Physical World and Measurement>Exercise-1>Q 27

The length of a cylinder is measured with a meter rod having least count

0.1 cm

. Its diameter is measured with vernier caliper having least count

0.01 cm

. Given that length is

5.0

cm

and radius is

2.0 cm

, the percentage error in the calculated value of the volume will be,

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Beta Question Bank for Engineering: Physics>Chapter 3 - Physical World and Measurement>Exercise-1>Q 28

The volume of a sphere is

1.76 {cm}^{3}

. The volume of

25

such spheres taking into account the significant figure is

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Beta Question Bank for Engineering: Physics>Chapter 3 - Physical World and Measurement>Exercise-1>Q 29

What is the fractional error in

g

calculated from

T = 2 π \sqrt{\frac{l}{g}}

? Given that fractional errors in

T

and

l

are

\pm x

and

\pm y

respectively.

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Beta Question Bank for Engineering: Physics>Chapter 3 - Physical World and Measurement>Exercise-1>Q 30

The resistance

R =

V i

where

V = 100 \pm 5

volts and

i = 10 \pm 0.2

amperes. What is the total error in

R

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Beta Question Bank for Engineering: Physics>Chapter 3 - Physical World and Measurement>Exercise-1>Q 31

The length, breadth and thickness of a strip are

(10.0 \pm 0.1) cm

,

(1.00 \pm 0.01) cm

and

(0.100 \pm 0.001) cm

respectively. The most probable error in its volume will be

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Beta Question Bank for Engineering: Physics>Chapter 3 - Physical World and Measurement>Exercise-1>Q 32

External and internal diameters of a hollow cylinder are measured to be

(4.23 \pm 0.01) cm

and

(3.89 \pm 0.01) cm

. The thickness of the wall of the cylinder is

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Beta Question Bank for Engineering: Physics>Chapter 3 - Physical World and Measurement>Exercise-1>Q 33

The radius of a disc is

1.2 cm .

Its area according to idea of significant figures is ,will be given by: