NEET Physics: Questions 444 - 447 of 2099
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Question number: 444
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 N-m | |
b. | 637 N-m | |
c. | 440 N-m | |
d. | 350 N-m |
Question number: 445
» 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: 446
Question
A torque of 20 N-m is applied on a 5 kg wheel whose moment of inertia is 2kg-m ^{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: 447
» 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 |