A particle of charge q and mass m is moving along the x-axis with a velocity of v and enters a region of electric field E and magnetic field B as shown in the figure below. For which figure is the net force on the charge zero?

1. 2.
3. 4.

Subtopic:  Lorentz Force |
 59%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A current-carrying wire is placed in a uniform magnetic field in the shape of the curve \(y= \alpha sin ({\pi x \over L}),~0 \underline{<}x \underline{<}~2L\) 
. What will be the force acting on the wire?
                   

1. \(iBL \over \pi\) 2. \(iBL \pi\)
3. \(2iBL \) 4. Zero
Subtopic:  Lorentz Force |
 69%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

 A long straight wire along the z-axis carries a current I in the negative z-direction. The magnetic field vector B at a point having coordinates (x, y) in the z = 0 plane is :

1. μ0I(yi^-xj^)2π(x2+y2)                 

2. μ0I(xi^+yj^)2π(x2+y2)

3. μ0I(xj^-yi^)2π(x2+y2)                 

4. μ0I(xi^-yj^)2π(x2+y2)

Subtopic:  Magnetic Field due to various cases |
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A circular coil is in the y-z plane with its centre at the origin. The coil carries a constant current. Assuming the direction of the magnetic field at x = – 25 cm to be positive, which of the following graphs shows the variation of the magnetic field along the x-axis?

1. option 2. option
3. option 4. option

Subtopic:  Magnetic Field due to various cases |
 69%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The ratio of the magnetic field at the centre of a current carrying circular wire and the magnetic field at the centre of a square coil made from the same length of wire will be

(a) π242                             (b) π282

(c) π22                             (d) π42 

Subtopic:  Magnetic Field due to various cases |
 56%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

A particle of charge +q and mass m moving under the influence of a uniform electric field Ei^ and a uniform magnetic field  Bk^ follows a trajectory from P to Q as shown in the figure. The velocities at P and Q are vi^ and -2vj^ respectively. Which of the following statement(s) is/are correct?

                   

1. \(\mathrm{E}=\frac{3}{4} \frac{\mathrm{mv}^2}{\mathrm{qa}}\)
2. Rate of work done by electric field at P is\(\frac{3}{4} \frac{\mathrm{mv}^3}{\mathrm{a}}\)
3. Rate of work done by both fields at Q is zero
4. All of the above
Subtopic:  Lorentz Force |
 70%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Figure shows a square loop ABCD with edge length a. The resistance of the wire ABC is r

and that of ADC is 2r. The value of magnetic field at the centre of the loop assuming

uniform wire is

                   

1. 2μ0i3πa                                 

2. 2μ0i3πa

3. 2μ0iπa                                   

4. 2μ0iπa   

Subtopic:  Magnetic Field due to various cases |
 61%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

For a positively charged particle moving in a  x- plane initially along the x-axis, there is a sudden change in its path due to the presence of electric and/or magnetic fields beyond P. The curved path is shown in the x-y plane and is found to be non-circular. Which one of the following combinations is possible

1.  E=0; B=bi^+ck^                 

2.  E=ai^; B=ck^+ai^

3. E=0;B=cj^+bk^                   

4.  E=ai^;B=ck^+bj^

 

Subtopic:  Lorentz Force |
 54%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Figure shows the cross-sectional view of the partially hollow cylindrical conductor with inner radius 'R' and outer radius '2R' carrying uniformly distributed current along it's axis. The magnetic induction at point 'P' at a distance 3R2 from the axis of the cylinder will be:

                     

1. Zero                               

2. 5μ0i72πR

3. 7μ0i18πR                             

4.  5μoi36πR

Subtopic:  Magnetic Field due to various cases |
 53%
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints

A long wire AB is placed on a table. Another wire PQ of mass 1.0 g and length 50 cm is set to slide on two rails PS and QR. A current of 50A is passed through the wires. At what distance above AB, will the wire PQ be in equilibrium

                     

1. 25 mm                           

2. 50 mm

3. 70 mm                           

4. 100 mm

Subtopic:  Lorentz Force |
 58%
From NCERT
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh