Measusrement — Physics MCQs (Class 11)
Free chapter-wise Physics MCQs with answers for MDCAT, FSc and entry tests.
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#209 If the error in the measurement of radius of a circle is 1 % then the error in the measurement of its area will be
A) 1.0 %
B) 2 %
C) 1.5 %
D) 3 %
#210 The radius of a wire is 0.24 mm. Then its area of cross-section by taking significant figures into consideration is
A) 0.19 $mm^{2}$
B) 0.190 $mm^{2}$
C) 0.18 $mm^{2}$
D) 0.180 $mm^{2}$
#211 The length, breadth and thickness of a block is measured to be 50 cm; 2.0 cm and cm. The percentage error in the measurement of volume is
A) 0.8 %
B) 8 %
C) 10 %
D) 12.5 %
#212 To reduce the timing uncertainty, it is advisable to
A) Count for smaller number of swing
B) Count for larger number of swing
C) Use a stop watch which is less sensitive
D) Both ‘A’ and ‘C’
#213 Which one of the following about systematic error is incorrect?
A) It influences all the measurement of a physical quantity equally
B) It produces consistent difference in reading
C) It can be reduced by comparing the instrument with standard instrument
D) It always occurs due to incorrect marking
#214 In an electrical circuit, the current in a resistor is measured as (2.50 ± 0.05) mA. The resistor is marked as 4.7 Ω ± 2%. What would be the %age uncertainty in power dissipation in resistor?
A) 2%
B) 4%
C) 6%
D) 8%
#215 Which one of the following measurement is more accurate?
$M_1$ = 1.0 cm ± 0.1 cm
$M_2$ = 0.10 cm ± 0.01 cm
$M_3$ = 0.100 cm ± 0.001 cm
A) $M_1$
B) $M_2$
C) $M_3$
D) All have same accuracy
#216 The distance $x = x_2 - x_1$ determined by the difference between two separate position measurements $x_1$ = 12.2 ± 0.2 cm and $x_2$ = 16.2 ± 0.1 cm is recorded as
A) 4.0 ± 0.2 cm
B) 4.0 ± 0.1 cm
C) 4.0 ± 0.3 cm
D) 4.0 ± 0.4 cm
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