Physics Class 11 - Chapter 1BRMeasurementsBRTest-3

Physics Class 11 - Chapter 1BRMeasurementsBRTest-3

1. The uncertainty in a measurement may occurs due to?

a) Limitation of instrument
b) Natural variation of the object to be measured
c) Inadequate if technique
d) All of these

2. Random error can be reduced by?

a) Taking mean of several measurements
b) Taking zero error
c) Comparing the instrument with another instrument
d) All of these

3. A digit zero in a measurement?

a) Always significant
b) Always insignificant
c) May be or may not be significant
d) Significant only if right to the significant figure

4. Smaller the least count of the instrument more is the measurement?

a) Precise
b) Accurate
c) Accurate and precise
d) None of these

5. Force dimension is?

a) MLT^-2
b) MLT^-1
c) MLT²
d) None of these

6. The dimension of momentum is?

a) MLT^-2
b) MLT^-1
c) MLT²
d) None of these

7. SI unit of coefficient of viscosity is?

a) KgmS^-1
b) Kgm^{-1S^-1}
c) KgmS
d) Kg^{-1m-^{-1S^-1}}

8. One light year is equal to?

a) 9.5x10^12m
b) 9.5x10^15m
c) 9.5x10^12cm
d) 9.5x10^15cm

9. Which equation is dimensionally correct?

a) S=1/2at^2+vit
b) 2as=v_{f^2-v_i²}
c) V_{f=v_i+at}
d) All of these

10. ML^{-1t^{-2 is the dimension of?
a) Force
b) Pressure
c) Momentum
d) Energy}}

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