NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 76  81 of 2142
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Question number: 76
» Physics and Measurement » SI Units
Question
10 the unit of Stefan’s constant a is
Choices
Choice (4)  Response  

a.  Wm ^{2} K ^{4} 

b.  Wm ^{2} K ^{4} 

c.  Wm ^{2} K ^{4} 

d.  Wm ^{2} K ^{1} 

Question number: 77
» Physics and Measurement » Errors in Measurement
Question
A physical parameter a can be determined by measuring the parameters b, c, d and e using the relation a =
If the maximum errors in the measurement of b, c, d and e are b1 %, c1 %, d1 %, and e1 %, then the maximum error in the value of a determined by the experiment is
Choices
Choice (4)  Response  

a.  (b _{1} + c _{1}  d _{1 }  e _{1}) % 

b.  (b _{1} + c _{1} + d _{1 } + e _{1}) % 

c.  (b _{1} + c _{1}  d _{1}  e _{1}) % 

d.  (b_{1} + c _{1} + d_{1} + e_{1}) % 

Question number: 78
» Physics and Measurement » Errors in Measurement
Question
If L = 2.331 cm, B = 2.1 cm, then L + B =
Choices
Choice (4)  Response  

a.  4, 43 cm 

b.  4 cm 

c.  4.431 cm 

d.  4.4 cm 

Question number: 79
» Physics and Measurement » Errors in Measurement
Question
In an experiment, the following observations were recorded: L = 2.820 m, M = 3.00 kg, l = 0.087 cm, Diameter D = 0.041 cm. Taking g = 9.81 m/s2 using the formula, Y =
, the maximum percentage error in Y is
Choices
Choice (4)  Response  

a.  6.50 % 

b.  4.56 % 

c.  7.96 % 

d.  8.42 % 

Question number: 80
» Kinematics » Average Speed and Instantaneous Velocity
Question
Two trains, each 50 m long are travelling in opposite direction with velocity 10 m/s and 15 m/s. The time of crossing is
Choices
Choice (4)  Response  

a. 
2V√3s 

b.  4s 

c. 
4√3s 

d.  Both c. and b. are correct 

Passage
The internal radius of a 1 m long resonance tube is measured as 3 cm. A tuning fork of frequency 3500Hz is used. The first resonating length is measured as 14.6 cm and the second resonating length is measured as 24.0 cm.
Question number: 81 (1 of 2 Based on Passage) Show Passage
» Physics and Measurement » Errors in Measurement
Question
Calculate the speed of sound at the room temperature
Choices
Choice (4)  Response  

a.  276 m/s 

b.  675 m/s 

c.  930 m/s 

d.  658 m/s 
