CBSE Class 12-science Answered
In a repeat of one of Michael Faraday's classic experiments, a solenoid of length 10 cm
with 200 turns and radius 1 cm is surrounded by another solenoid of the same length,
but with 400 turns and radius 2 cm. The two solenoids are not in contact. A current
is switched on through the inner solenoid. Suppose that the current increases at the
rate of 100As????1 during the switch-on. What is the emf induced in the outer solenoid?
(Assume that a current carrying solenoid has no magnetic eld outside it.)
Asked by | 27 Jan, 2012, 03:46: PM
Expert Answer
The emf induced=L dI/dt
L=?0 *n1* n2* l* ? r22
n1= no of turns per unit length in small solenoid.
n2= no of turnsper unit length in second solenoid
dI/dt=100 A/sec.
n1=200/10= 20 turns /cm
n2=400/10= 40 turns /cm
r2=2cm.
put the values and get the answer.
Answered by | 30 Jan, 2012, 08:02: PM
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