Physics
Measusrement
Page 16 of 28
#121 In vernier calipers, the zero of vernier to the left of main zero indicates:
A) positive zero error
B) negative zero error
C) no error
D) backlash
#122 Backlash error in screw gauge is minimized by:
A) tightening the screw more
B) rotating the screw in one direction while taking readings
C) using larger pitch
D) ignoring least count
#123 Pitch of screw gauge is defined as:
A) distance moved in one complete rotation
B) value of one division on circular scale
C) least count
D) radius of spindle
#124 A meter rule has least count:
A) $1\ \text{mm}$
B) $0.1\ \text{mm}$
C) $0.01\ \text{mm}$
D) $0.5\ \text{mm}$
#125 Dimensionless quantities can have units.
A) True
B) False
C) Sometimes
D) Only in CGS
#126 Two quantities with same dimensions need not be numerically equal.
A) True
B) False
C) Only in SI
D) Only in CGS
#127 A physical law must be dimensionally homogeneous.
A) True
B) False
C) Not necessary
D) Only empirical laws
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