Physics
Measusrement
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#201 Unit of power in terms of base units
A) watt
B) J/s
C) $kgm^{2}s^{-3}$
D) $kgm^{2}s^{-2}$
#202 The physical quantity which can be written in terms of just two different SI base units
A) Velocity
B) Area
C) Angular acceleration
D) All
#203 Which of the following pairs have not the same units?
A) Torque and angular momentum
B) Young’s modulus and pressure
C) Torque and work
D) Work and energy
#204 A precise measurement is one which has
A) High precision
B) Low precision
C) Maximum percentage uncertainty
D) Both B and C
#205 A student takes 100 observations in an experiment. Second time he takes 500 observations in the same experiment. By doing so the possible error becomes
A) 5 times greater
B) 1/5 times lesser
C) 10 times greater
D) 1/10 times lesser
#206 Density of a liquid is 13.6 g $cm^{-3}$. Its value in SI units is
A) 136.0 kg $m^{-3}$
B) 13600 kg $m^{-3}$
C) 13.6 kg $m^{-3}$
D) 1.36 kg $m^{-3}$
#207 The density of a cube is measured by measuring its mass and the length of its side. If the maximum errors in the measurement of mass and length are 3% and 2%, respectively, then maximum error in the measurement of density is
A) 1 %
B) 5 %
C) 7 %
D) 9 %
#208 While measuring acceleration due to gravity by a simple pendulum, a student makes a positive error of 1 % in the length of the pendulum and a negative error of 3 % in the value of time period. The percentage error in the measurement of g is
A) 2 %
B) 4 %
C) 7 %
D) 10 %
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