Magnetic Effects of Current and Magnetism (NEET (NTANational Eligibility cum Medical Entrance Test) Physics): Questions 50  53 of 155
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: 50
» Magnetic Effects of Current and Magnetism » Bar Magnet
Question
A short magnet of length 4 cm is kept at a distance of 20 cm to the east of a compass box such that is axis is perpendicular to the magnetic meridian. If the deflection produced is 45°, find the pole strength (H = 30 Am ^{1})
Choices
Choice (4)  Response  

a.  17.7 Am 

b.  37.7 Am 

c.  44.2 Am 

d.  27.7 Am 

Question number: 51
» Magnetic Effects of Current and Magnetism » Bar Magnet
Question
A north pole of strength 50 Am and South Pole of strength 100 Am are separated by a distance of 10 cm in air. Find the force between them.
Choices
Choice (4)  Response  

a.  20 x 10 ^{6 } N 

b.  25 x 10 ^{3} N 

c.  30 x 10 ^{18 } N 

d.  50 x 10 ^{3} N 

Question number: 52
» Magnetic Effects of Current and Magnetism » Moving Coil Galvanometer
Question
In a moving coil galvanometer, the deflection of the coil θ is related to the electrical current i by the relation
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 


Question number: 53
» Magnetic Effects of Current and Magnetism » Biot  Savart Law
Question
The straight long conductors AOB and COD are perpendicular to each other and carry current and . The magnitude of the magnetic induction at point P at a distance ‘a’ from the point O in a direction perpendicular to the plane ACBD is
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

