Magnetic Effects of Current and Magnetism (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 50  53 of 155
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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. 

