Email  
Electromagnetism
Tags: Engineering Entrance  |  Medical Entrance  |  JEE Main  |  CBSE Board  |  JEE Main & Advanced  |  Class 11  |  Class 12  |  Electromagnetism
  « Back to Content










Electromagnetism Numericals - I

Illustration:
Q1. A change q moves in a circular path of radius r with a speed of v. Calculate the induction of the magnetic field produced at the centre of the circle.

Solution: The equivalent current in the circular path is

I =

B =
Q2. The coil of a galvanometer has 500 turns and each turns has an avg. area 3 x 10-4 m2. calculate the magnetic moment of the coil when a current of 0.5 A passes throgh it. If a torque of 1.5 Nm is required for this coil carrying same current to set it parallel to a magnetic field. Calculate the magnetic field.

Solution: µ = NIA

= 500 x 0.5 x 3 x 10-4

= 0.075 Am2

Also or || = µB sin

where = angle between B and A

Here = 900

= µB sin900

B = = 20 T
ASSIGNMENTS:
Easy:
E1. Find the magnetude of magnetic field at point P due to the current carrying wire as shown.



Solution:


1
= - 30
0
,   
2
= 60
0


E2. Shown infigure is a conductor carrying current I. Find the magnetic field intensity at the point O.



Solution: B =

[Due to an are]







E3. What is the work done in transferring the wire from position (1) to position(2) ?



Solution:



The 'd' magnetic moment of the loop = I
2
l dr

B
r
=


U
r
=





-

U = work done
- (U
2
- U
1
)

     |     

 
  Electricity and Effect of Current      Centre of Mass      Magnetic Effects of Current      CBSE Prelim-2009 Answers      AIEEE 2009 Solutions and Analysis      English Core-XII Sample Test Paper      Function Theory      Basis of Inheritance      dasda      Business Studies -XII Sample Test Paper      Chemical Bonding      Group I A      Integration Theory      Organic Chemistry Basic Concepts      Applications of Derivatives      Informatics Practices (065) Sample Question Paper -III      Inorganic Chemistry Group VI A      Properties of Matter      Heat & Thermodynamics      Disha - Path to Success Series     
 



Free Sign Up!
Sponsored Ads

Preparing for JEE?

Kickstart your preparation with new improved study material - Books & Online Test Series for JEE 2014/ 2015


@ INR 5,443/-

For Quick Info

Name

Mobile

E-mail

City

Class