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Important questions on Significant Figures

HARD

A student measures the time period of oscillations of a simple pendulum four times. The data set is  and . If the minimum division in the measuring clock is , then the reported mean time should be:

A

B

C

D

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HARD

The diameter of a sphere is 3.34 m. Calculate is Volume with due regard to significant figures.

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HARD

The edge of a cube is measured using a vernier callipers. [9 divisions of the main scale is equal to 10 divisions of vernier scale and 1 main scale division is 1 mm]. The main scale division reading is 10 and 1 division of vernier scale was found to be coinciding with the main scale. The mass of the cube is 2.736 gm. Calculate the density in up to correct significant figures. 

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HARD

The number of significant figures in is the

A

B

C

D

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HARD

In an experiment the following observations were recorded 
metre
kg
cm
cm

and the formula used for calculatlon of Young's modulus () is
What is the maximum possible error expressed in percentage?

A

6.36%

B

4.8%

C

3%

D

1%

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HARD

Calculate focal length of a spherical mirror from the following observations.
Object distance, u=(50.1±0.5)u=(50.1±0.5) cm
Image distance, v=(20.1±0.2) cm

A

cm

B

cm

C

cm

D

cm

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HARD

The length , breadth b and thickness t of a block of wood were measured with the help of a measuring scale. The results with permissible errors are = 15.12 0.01 cm, t = 5.28 0.01 cm. = 10.15 0.01 cm. The percentage error in volume upto proper significant figures is :

A

0.28%

B

0.36%

C

0.48%

D

0.64%

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HARD

The length and breadth of a metal sheet are and respectively. The area of this sheet upto four correct significant figure is :

A

B

C

D

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HARD

Solve with due regard to significant figures:

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HARD

The mass of a body is 10.000 gm and its volume is . If the measured values are expressed upto correct significant figures, then the maximum error in the measurement of density is :

A

B

C

D

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