Magnetic Effects of Current and MagnetismElectric Charge Moving in Magnetic Field (NEET Physics): Questions 16  20 of 28
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Question number: 16
» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field
Question
An electron is revolving in a circular path of radius 2 x l0 ^{10} m with a speed of 3 x l0 ^{6} m/s. The magnetic field at the center of circular path will be
Choices
Choice (4)  Response  

a.  0 

b.  1.2 T 

c.  2.4 T 

d.  3.6 T 

Question number: 17
» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field
Question
An αparticle is describing a circle of radius 0.45 m in a field of magnetic induction 1.2 weber/m ^{2}. The potential difference required to accelerate the particle, (The mass of aparticle is 6.8 x 10 ^{27} kg and its charge is 3.2 x 10 ^{19} coulomb. ) will be
Choices
Choice (4)  Response  

a.  2.3 x 10 ^{12 } V 

b.  6 x 10 ^{6 } V 

c.  7 x 10 ^{6 } V 

d.  3.2 x 10 ^{12 } V 

Question number: 18
» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field
Question
If an αparticle moving with velocity V enters perpendicular to a magnetic field then the magnetic force acting on it will be
Choices
Choice (4)  Response  

a.  2evB 

b.  4evB 

c.  0 

d.  evB 

Question number: 19
» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field
Question
An electron beam passes through a magnetic field of 2 x 10 ^{3} weber/m ^{2} and an electric field of 1.0 x 10 ^{4} volt/m both acting simultaneously. If the electric field is removed, what will be the radius of the electron path?
Choices
Choice (4)  Response  

a.  1.43 cm. 

b.  0.43 cm 

c.  3.43 cm. 

d.  2.43 cm. 

Question number: 20
» Magnetic Effects of Current and Magnetism » Electric Charge Moving in Magnetic Field
Question
An electron and a proton having same kinetic energy enter a magnetic field at right angles. If and represents the radii of curvature of circular path than is,
Choices
Choice (4)  Response  

a. 


b. 


c. 


d. 

