NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics: Questions 339  342 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: 339
» Kinematics » Average Speed and Instantaneous Velocity
Question
A swimmer who can swim in a river with speed mv (with respect to still water) where v is the velocity of river current, jumps into the river from one bank to cross the river. Then
Select the correct answers and mark it according to the following codes:
(1) If m < 1 he cannot cross the river
(2) If m < 1 he cannot reach a point on other bank directly opposite to his starting point.
(3) If m > 1 he can reach a point on other bank
(4) He can reach the other bank at some point, whatever be the value of m.
Choices
Choice (4)  Response  

a.  1 and 2 are correct 

b.  1,2 and 3 are correct 

c.  2 and 4 are correct 

d.  1 and 3 are correct 

Question number: 340
» Kinematics » Uniform and NonUniform Motion
Question
A block of metal weighing 2 kg is resting on a frictionless plane. It is stick by a jet releasing water at a rate of 1 kg/s and at a speed of 5 m/s. The initial acceleration of the block will be –
Choices
Choice (4)  Response  

a.  0 

b.  2.5 m/s ^{2} 

c.  0.4 m/s ^{2} 

d.  5 m/s ^{2} 

Question number: 341
» Electrostatics » Electric Field
Question
Figure shows the electric lines of force emerging from a charged body. If the electric field at A and B are E _{A} and E _{B} respectively and if the distance between them is r then
Choices
Choice (4)  Response  

a.  E _{A} > E _{B} 

b. 


c. 


d.  E _{A} < E _{B} 

Question number: 342
» Electrostatics » Electrostatic Potential Energy
Question
Two equal charges q are placed at a distance of 2a and a third charge 2q is placed at the midpoint. The potential energy of the system is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

