MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Grade: 12
        

2 parallel conducting wires are joined by a similar conducting wire . the entire system is placed in a perpendicular magnetic field B . the entire wire is having resistance per unit length of xohms per meter.a conducting rod PQ of negligible resistance is moving with constant velocity v' under action of variable force at t=0 to x=0. determine magnitude of variable force acting on rod as a funtion of time.

8 years ago

Answers : (1)

vikas askiitian expert
509 Points
							

   after time t , distance covered = x = vt

change in flux from initial stage to stage at t = t is d@

d@ = (dA)cos0 = B(dA)

 dA = L(vt)       (change in area)

d@ = BLvt

e = d@/dt = BLv          ..............1

now , I = e/R            .............2              (R is resistance of loop)

since rod is at x distance from initial so net length of parallel wires = 2x                  ( x on both sides)

let Ro is resistance per unit length then resistance of this wire is

R = 2x(Ro)                    

x = vt

R = 2Rovt         ............3

magnetic force on rod = ILB = eLB/R

                               =B2L2v/R                            

                           F  =B2L2/2Rot       ...................4

this is the required force for which rod moves with constant velocity .......

          F inversly proportional to time & F vs time is rectangular hyperbola

 

approve if u like my ans

8 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies


Course Features

  • 731 Video Lectures
  • Revision Notes
  • Previous Year Papers
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Test paper with Video Solution


Course Features

  • 57 Video Lectures
  • Revision Notes
  • Test paper with Video Solution
  • Mind Map
  • Study Planner
  • NCERT Solutions
  • Discussion Forum
  • Previous Year Exam Questions


Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details