Magnetic Effects of Current and Magnetism (NEET (NTA)National Eligibility cum Entrance Test (Medical) Physics): Questions 1  3 of 155
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Question number: 1
» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field
Question
In the figure the two parallel wires PQ and ST are at 30 cm apart. The currents flowing in the wires are according to figure. The force acting over a length of 5m of the wires is
(1) 5 x 10 ^{4 } N (2) attraction
(3) 5 x 10 ^{8 } N (4) repulsion
Select the correct answers and mark it according to the following codes:
Choices
Choice (4)  Response  

a.  1 and 2 are correct 

b.  1,2 and 3 are correct 

c.  1 and 3 are correct 

d.  2 and 4 are correct 

Question number: 2
» Magnetic Effects of Current and Magnetism » Ampere's Law
Question
A current is flowing through a conducting hollow pipe whose area of crosssection is shown in the fig. The value of magnetic induction will be zero at
Choices
Choice (4)  Response  

a.  Point Q but not at P and R 

b.  Point P but not at Q and R 

c.  Point P, Q and R 

d.  Point R but not at P and Q 

Question number: 3
» Magnetic Effects of Current and Magnetism » Magnetic Susceptibility and Permeability
Question
For an isotropic medium B, µ _{0}, H and M are related as (where B, μ _{ 0}, H and M have their usual meaning in the context of magnetic material)
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

