NEET Physics: Questions 76  81 of 2142
Get 1 year subscription: Access detailed explanations (illustrated with images and videos) to 2142 questions. Access all new questions we will add tracking exampattern and syllabus changes. View Sample Explanation or View Features.
Rs. 550.00 or
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 
