NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 186  190 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: 186
» Laws of Motion » Centripetal Force
Question
An electron is moving in a circular orbit of radius 5.3 x 10 ^{11} metre around the atomic nucleus at a rate of 6.6 x 1015 revolutions per second. The centripetal force acting on the electron will be 
(The mass of the electron is 9.1 x 10  31kg)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 187
» Kinematics » Motion in a Straight Line
Question
A motor car is travelling at 50 m/s on a circular road of radius 600 m. It is increasing its speed at the rate of 4 m/s ^{2}. Its net acceleration is (in m/s ^{2}) –
Choices
Choice (4)  Response  

a.  4.8 

b.  5.7 

c.  2 

d.  0 

Question number: 188
» Kinematics » Average Speed and Instantaneous Velocity
Question
A particle moves in a circle of radius 20cm with a linear speed of 10m/s. The angular velocity will be –
Choices
Choice (4)  Response  

a.  100 rad/s 

b.  50 rad/s 

c.  25 rad/s 

d.  75 rad/s 

Question number: 189
» Laws of Motion » Centripetal Force
Question
The maximum speed at which a car can turn round a curve of 40 metre radius on a level road if the coefficient of friction between the tyres and the road is 0.6, will be –
Choices
Choice (4)  Response  

a.  15.3 m/s 

b.  9.0 m/s 

c.  10.8 m/s 

d.  17.8 m/s 

Question number: 190
» Laws of Motion » Centripetal Force
Question
A smooth table is placed horizontally and a spring of unstarched length 0 and force constant k has one end fixed to its center. To the other end of the spring is attached a mass m which is making n revolution per second around the center. Tension in the spring will be
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

