Physics
Chapter No 1
Page 3 of 6
#17 Which of the following is not a correct unit of work?
A) Erg
B) Joule
C) Dyne
D) Nm
#18 The ratio of diameter of a circle to its circumference is
A) 2π
B) π
C) π/2
D) None
#19 Which of the following is dimensionally correct?
A) 5 km = 5000 s
B) 5 km = 500 m
C) 5 km = 50 kg
D) 5 m = 500 s
#20 The density of the air is 1.2 kg/m3 . This density is CGS system is
A) 1.2 mg/cm3
B) 1.2 g/cm3
C) 2.3 g/cm3
D) none
#21 The absolute uncertainty is equal to the
A) Least count of apparatus
B) Half of the last count of apparatus
C) Double of least count of apparatus
D) Depends upon systematic error
#22 The ratio of dimension of impulsive force to gravitational force is
A) 1:1
B) 1 : T-1
C) T-1 : 1
D) 1 : T-2
#23 The number of significant figures in the measurement x = 10.00300 cm are
A) 7
B) 8
C) 5
D) 2
Page 3 of 6
Register or Login for comments
Comments: