ECAT MCQ Quiz Hub

1. Which one is not a branch of physical sciences?
chemistry
astronomy
geology
biology

2. Which branch of science plays an important role in the development of technology and engineering?
chemistry
physics
geology
biology

3. The number of categories in which physical quantities are divided are
one
two
three
four

4. In scientific notation numbers are expressed in
power of ten
powers of two
reciprocal
decimal

5. 1024 can be written in scientific notation as
1.024x103
2 Raised to power 10
0.000976
1/0.00097

6. How many types of units are in SI?
one
two
three
four

7. The error in measurement may occur due to
inexperience of a person
the faulty apparantus
inappropriate method
due to all reasons in a b and c

8. The uncertainty in a measurement may occur due to
limitation of an instrument
natural variation of the object to be measured
inadequate of technique
all given in a b and c

9. Random errors can be reduced by
taking zero correction
comparing the instrument with another more accurate one
taking mean of several measurement
all methods explained in a b and c

10. Preftix deca represents
10 Raised to power 1
10 Raised to power 2
10 Raised to power 3
10 Raised to power -1

11. In any measurement the significant figures are
all accurately known and all doubtful digits
only accurately known digits
only doubtful digits
all accurately known digits and the first doubuful digit

12. A digit zero in a measurement
may be significant may not significant
always significant
always insignificantsig
significant only if left to a significant figure

13. Number of significant figures in 0.0173 are
three
four
five
two

14. Smaller the least count of the instrument more is the measurement
accurate
precise
accurate and precise
none of these

15. The dimension of force is
MLT-1
MLT-2
ML-1T
ML-1T-2

16. ML-1 T-2 is the dimension of
force
pressure
momentum
energy

17. Dimensional analysis is helpful for
deriving a possible formula
checking the homogeneity of a physical equation
verification of laws
only a and b are correct

18. Which equation is not dimensionally correct?
E=mc2
Vf=Vi+at
S=Vt2
S=1/2at2

19. SI unit of coefficient of viscosity is
Kg.m.S-1
Kg m-1.S-1
Kg.m.S
Kg-1.m-1.S-1

20. Three students measured length of a needle with meter rod and recorded as : (i) 0.2145m (ii) 0.21m (iii) 0.214m Which one is correct record?
only (i)
only (ii)
only (iii)
both (i) and (ii)

21. One light year is equal to
9.5x1015m
9.5x1015sec
9.5x1015Km
9.5x1015cm

22. Absolute uncertainty in a measurement depends upon
magnitude of the measurement
least count of the instrument
percentage error in the measurement
all of a b and c

23. Steradian is the SI unit of
plane angle
solid angle
both plane angle and solid angle
neither plane angle nor solid angle

24. An ideal standard of measurement of a base quantity has characteristics
accessible
invariable
transportable
only a and b are correct

25. Total uncertainty in result obtained from the subtraction of two measurement is equal to
sum of their absolute uncertainties
difference of their absolute uncertainties
verification of laws
division of their absolute uncertainties

26. Which one is the highest power multiple?
giga
beta
mega
deca

27. One pico stands for
10 raised to power -15
10 raised to power -12
10 raised to power -9
10 raised to power -6

28. The unit of force is _________ and its symbol is __________. Which is the correct pair?
Newton n
Newton N
newton n
newton N

29. Unit of G is?
Nm2Kg2
Nm2Kg
Nm2Kg-2
none

30. How many main frontiers of fundamental science?
1
2
3
4

31. Which one is the derived quantity in SI units?
electric current
electric charge
plane angle
amount of substance

32. Which one is the correct representation of the unit of pressure?
Newton/Meter2
newton/meter2
Newton/meter2
newton/Meter2

33. Which one is the dimensionally correct equation?
f=vt
S=Vit+1/2at2
V=St
V=f/t

34. Zero error of the instrument is a type of
random error
personal error
systematic error
classified error

35. In multiplication and division of measurement
percentage uncertainties are added
absolute uncertainties are added
percentage uncertainties are divided
absolute uncertainties are divided

36. The number of significant figures in 5.400 are
three
five
two
none

37. To reduce the uncertainty in the timing experiment
highly precise instrument
conduct at room temperature
count more number of vibration
both a and c

38. The unmber of significant figures in the length of a bar 6200mm measured by meter rod are
four
three
two
none of these

39. The number 76.85 is rounded off upto two significant figures as
76.8
77
76.9
none of these

40. Which of the following is not a correct representation method for prefixes
1mm
10km
1000um
both (a) and (b)