Q. 45

# A circular loop of radius 4.0 cm is placed in a horizontal plane and carries an electric current of 5.0 A in the clockwise direction as seen from above. Find the magnetic field.(a) at a point 3.0 cm above the center of the loop(b) at a point 3.0 cm below the center of the loop.

Given:

Radius of circular loop(r) = 4 cm = 0.04 m

Current carried by it(i) = 5 A

Formula used:

Magnetic field at a distance x from the center of a current carrying circular loop(B),

Where

μ0 = magnetic permeability of vacuum = 4π x 10-7 T m A-1,

i = current carried by coil,

(a) To find the magnetic field 3 cm above the loop:

Magnetic field,

Here, x = 3 cm = 0.03 m

Hence, substituting the given values:

= 4.019 x 10-5 T (in the downward direction, by right hand thumb rule) (Ans)

(b) To find the magnetic field 3 cm below the loop:

Here, all the values are same as the previous part. Hence,

B = 4.019 x 10-5 T (in the upward direction, by right hand thumb rule)

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Magnetic field due to current carrying straight wire37 mins
Magnetic field due to current carrying circular loop36 mins
Interactive Quiz on Magnetic field due to straight wire & circular loop41 mins
Gain Confidence on Magnetic Effects of Current with Questions41 mins
Equation of electric and magnetic field52 mins
Magnetic force on moving charge particle in magnetic field | Quiz32 mins
Magnetic force on moving charge particle in magnetic field44 mins
Superfast Revision of Potential & Potenial Energy (Theory + Interactive Quiz)47 mins
Few Applications of Gauss's law54 mins
Test Your Knowledge of Electric Charge & Coulomb's Law47 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses