11)

1unified atomic mass unit =

A)

1.66*1027kg

B)

1.66*10-27g

C)

1.66*10-27kg

D)

None

12)

Size of the atomic nucleus is of the order of

A)

10-13m

B)

10-14m

C)

10-15m

D)

10-16m

13)

The length of the typical virus is if the order of

A)

10-10m

 

B)

10-8m

C)

10-9m

D)

10-6m

14)

Distance of the moon from the earth is

A)

107m

 

B)

1010m

 

C)

108m

D)

109m

15)

The uncertainty in the measuring instruments is called

A)

Uncertainty

B)

Error

C)

Both a and b

D)

None

16)

The errors which arises from the errors due to imperfect design or calibration of the measuring instruments are called

 

A)

Systematic errors

 

 

B)

Instrumental errors

C)

Personal errors

D)

None

17)

The errors which occurs irregularly and hence random with respect to size and sign are called

A)

Systematic errors

B)

Personal errors

 

C)

Random errors

D)

None

18)

The errors associated with the resolution of the instrument is called as

A)

Personal errors

 

B)

Instrumental errors

C)

Least count errors

D)

None

19)

The arithmetic mean of all the absolute errors taken is called as

A)

Average absolute error

B)

Mean absolute error

 

C)

Absolute error

D)

None

20)

When relative error is expressed in per cent then it is called as

A)

Absolute error

 

B)

Mean absolute error

C)

Percentage error

D)

None