NEET (National Eligibility cum Medical Entrance Test) Physics: Questions 443  446 of 2142
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Question number: 443
Question
An automobile engine develops 100 kW when rotating at a speed of 1500 rev/min. What torque does it deliver?
Choices
Choice (4)  Response  

a.  531 Nm 

b.  637 Nm 

c.  440 Nm 

d.  350 Nm 

Question number: 444
» Electrostatics » Electric Potential
Question
A point Q lies on the perpendicular bisector of an electrical dipole of dipole moment p. If the distance of Q from the dipole is r (much larger than the size of the dipole), then electric field at Q is proportional to
Choices
Choice (4)  Response  

a.  p ^{1 } and r ^{2} 

b.  p and r ^{2} 

c.  p and r ^{3} 

d.  P ^{2} and r ^{3} 

Question number: 445
Question
A torque of 20 Nm is applied on a 5 kg wheel whose moment of inertia is 2kgm ^{2} for 10 sec. The angle covers by the wheel in 10 sec will be
Choices
Choice (4)  Response  

a.  3000 rad 

b.  500 rad 

c.  750 rad 

d.  6000 rad 

Question number: 446
» Communication System » Need for Modulation
Question
Students I, II and III perform an experiment for measuring the acceleration due to gravity (g) using a simple pendulum. They use different lengths of the pendulum and/or record time for different number of oscillations. The observations are shown in the table. Least count for length = 0.1 cm
Student  Length of the pendulum (cm)  No. of oscillations (n)  Total time for (n) oscillations (s)  Time Period (s) 
I  64.0  8  128.0  16.0 
II  64.0  4  64.0  16.0 
III  20.0  4  36.0  9.0 
If E _{I}, E _{II} and E _{III} are the percentage errors in g, i. e. , ( for students, I, II and III, respectively, then
Choices
Choice (4)  Response  

a.  E _{I }= 0 

b.  E _{I} = E _{II} 

c.  E _{I} is minimum 

d.  E _{II} is maximum 
