Magnetics Quiz-02

Magnetics Quiz-02

1. A battery is connected between two points A and B on the circumference of a uniform conducting ring of radius r and resistance R. One of the arcs AB of the ring subtends an angle θ at the center . The value of the magnetic induction at the center due to the current in the ring is

 
 
 
 

2. Two particles X and Y having equal charges, after being accelerated through the same potential difference, enter a region of uniform magnetic field and describe circular paths of radii R1 and R2 respectively.  The ratio of the mass of X to that of Y is

 
 
 
 

3. Two particles, each of mass m and charge q , are attached to the ends of a light rigid rod of length 2R. The rod is rotated at constant angular speed about a perpendicular axis passing through its center. The ratio of the magnitudes of the magnetic moment of the system and its angular momentum about the center of the rod is

 
 
 
 

4. A proton, a deutron and an α-particle having the same kinetic energy are moving in a circular trajectories in a constant magnetic field. If rp , rd and rα denote, respectively the radii of the trajectories of these particles, then

 
 
 
 

5. A, current I flows along the length of an infinitely long, straight, thin-walled pipe. Then

 
 
 
 

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