A current I=1.5 A is flowing throug...
Question
A current I=1.5 A is flowing through a long solenoid of diameter 3.2cm, having 220 turns per cm. At its centre, a 130 turn closely packed coil of diameter 2.1cm is p
Fullscreen

A current ( I=1.5 ) A is flowing through a long solenoid of diameter ( 3.2 mathrm{cm}, ) having 220 turns per cm. At its centre, a 130 turn closely packed coil of diameter ( 2.1 mathrm{cm} ) is placed such that the coil is coaxial with the long solenoid. The current in the solenoid is reduced to zero at a steady rate in 25 ms. What is the magnitude of emf induced in the coil while the current in the solenoid is changing?

JEE/Engineering Exams
Physics
Solution
54
Rating
4.0 (1 ratings)
A current I=1.5 A is flowing through a long solenoid of diameter 3.2cm, having 220 turns per cm. At its centre, a 130 turn closely packed coil of diameter 2.1cm is placed such that the coil is coaxial with the long solenoid. The current in the solenoid is reduced to zero at a steady rate in 25 ms. What is the magnitude of emf induced in the coil while the current in the solenoid is changing?
Fullscreen

field throught he inner solenoid ( n=22000 ) tur ( n / m i=1.5 )
( B=mu_{0} n i=4 pi^{*} 10^{-7} * 22000^{*} 1.5=0 )
0415 tesla
emf induced in the coil ( =frac{130^{*} 0.0415^{*} pi^{*}(0.0105)^{2}}{25^{*} 10^{-3}}=0.0748 mathrm{Volt} )

Quick and Stepwise Solutions Just click and Send Download App OVER 20 LAKH QUESTIONS ANSWERED Download App for Free