Two straight long conductors AOB and COD are perpendicular to each other and carry currents i1 and i2 . The magnitude of the magnetic induction at a point P at a distance a from the point O in a direction perpendicular to the plane ACBD is: 

1. μ02πa(i1+i2)                    2. μ02πa(i1-i2)

3. μ02πai12+i221/2                4. μ02πai1i2(i1+i2)

Concept Questions :-

Magnetic field due to various cases
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


The charge on a particle Y is double the charge on particle X. These two particles X and Y after being accelerated through the same potential difference enter a region of the 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:

(a) 2R1R22                      (b) R12R22

(c)  R122R22                           (d) 2R1R2 

Concept Questions :-

Lorentz force
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


In the given figure, the electron enters into the magnetic field. It deflects in ...... direction

                      

(a) + ve X direction

(b) – ve X direction

(c) + ve Y direction

(d) – ve Y direction

Concept Questions :-

Lorentz force
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


A cell is connected between the points A and C of a circular conductor ABCD of centre O with angle AOC = 60° . If B1 and B2 are the magnitudes of the magnetic fields at O due to the currents in ABC and ADC respectively, the ratio B1B2 is:

1. 0.2                             

2. 6                                    

3. 1

4. 5                    

 

Concept Questions :-

Magnetic field due to various cases
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


An electron, a proton, a deuteron and an alpha particle, each having the same speed are in a region of constant magnetic field perpendicular to the direction of the velocities of the particles. The radius of the circular orbits of these particles are respectively Re, RpRd and Rα. It follows that 

(a) Re=Rp                (b) Rp=Rd

(c) Rd=Rα                 (d) Rp=Rα

Concept Questions :-

Lorentz force
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


An infinitely long conductor PQR is bent to form a right angle as shown. A current I flows through PQR. The magnetic field due to this current at the point M is H1. Now another infinitely long straight conductor QS is connected at Q so that the current is I/2 in QR as well as in QS, The current in PQ remaining unchanged. The magnetic field at M is now H2The ratio H1/H2 is given by

(a) 12                                                

(b)  1

(c)  23

(d)  2

Concept Questions :-

Magnetic field due to various cases
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


A very long straight wire carries a current I. At the instant when a charge +O~ at point P has velocity v , as shown, the force on the charge is:

1. Opposite to OX                            2. Along OX

3. Opposite to OY                             4. Along OY

Concept Questions :-

Lorentz force
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


An electric field of 1500 V / m and a magnetic field of 0.40 weber / meter2 act on a moving electron. The minimum uniform speed along a straight line the electron could have is

(a) 1.6×1015m/s                          (b) 6×10-16m/s

(c) 3.75×103m/s                          (d) 3.75×102m/s

Concept Questions :-

Lorentz force
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


A coil having N turns is wound tightly in the form of a spiral with inner and outer radii a and b respectively. When a current I passes through the coil, the magnetic field at the centre is:

1. μ0NIb                                  2. 2μ0NIa

3. μ0NI2(b-a)lnba                         4. μ0IN2(b-a)lnba

Concept Questions :-

Magnetic field due to various cases
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


An electron, moving in a uniform magnetic field of induction of intensity B, has its radius directly proportional to :

(a) Its charge                        (b) Magnetic field

(c) Speed                               (d) None of these

Concept Questions :-

Lorentz force
To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level: