Physics and Measurement (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 6  11 of 62
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Question number: 6
» Physics and Measurement » Dimensions of Physical Quantities
Question
The dimensional formula for Planck’s constant (h) is
Choices
Choice (4)  Response  

a.  [M ^{0} L ^{2} T ^{1}] 

b.  [M ^{0} L ^{2} T ^{2}] 

c.  [M L ^{2} T ^{2}] 

d.  [M L ^{2} T ^{3}] 

Question number: 7
» Physics and Measurement » Errors in Measurement
Question
The period of oscillation of a simple pendulum is given by T = 2π
where l is about 100 cm and is known to have l mm accuracy. The period is about 2s. The time of 100 oscillations is measured by a stopwatch of least count 0.1s. The percentage error in g is
Choices
Choice (4)  Response  

a.  0.8% 

b.  0.1% 

c.  1% 

d.  0.2% 

Question number: 8
» Physics and Measurement » Technology and Society
Question
Which of the following pairs is wrong?
Choices
Choice (4)  Response  

a.  Relative densityhydrometer 

b.  EarthquakeSeismograph 

c.  Temperaturespectrometer 

d.  PressureBarometer 

Question number: 9
» Physics and Measurement » Errors in Measurement
Question
The random error in the arithmetic mean of 100 observations is x; then random error in the arithmetic mean of 400 observations would be
Choices
Choice (4)  Response  

a.  4x 

b.  2 x 

c.  0.25 x 

d.  0.5x 

Question number: 10
» Physics and Measurement » Errors in Measurement
Question
The length of a cylinder is measured with a meter rod having least count 0.1 cm. Its diameter is measured with Vernier calipers having least count 0.01 cm. Given that length is 5.0 cm. and radius is 2.0 cm. The percentage error in the calculated value of the volume will be
Choices
Choice (4)  Response  

a.  4% 

b.  1 % 

c.  2% 

d.  3% 

Question number: 11
» Physics and Measurement » Errors in Measurement
Question
According to Joule’s law of heating, heat produced H = I ^{2} Rt, where I is current, R is resistance and t is time. If the errors in the measurements of I, R, and t. are 3%, 4 % and 6 % respectively then error in the measurement of H is
Choices
Choice (4)  Response  

a.  17 % 

b.  25% 

c.  16% 

d.  19% 
