DAT 90% Wed Aug 5 12:57 PM a E Preview File Edit View Go Tools Window Help old f
ID: 1403003 • Letter: D
Question
DAT 90% Wed Aug 5 12:57 PM a E Preview File Edit View Go Tools Window Help old finlb.gif Edited a Search 1. A coil is located at the center of a long solenoid ofradius R 15 cm which has 5x107turns per meter and carries a current I 16 A. The coi1 is coaxial with the solenoid and consist of 5 turns of wire, each in shape of a square ofle a 5cm oneach side. solenoid coil A. (5 pts What is the magnetic flux passing through each loop of the coil? Ans. 2.51 Wb B.(5 pts) If the current in thesolenoid is not constant but varies as I- Lm cas ot, where 16 Ans. 125.7 V A and 10rad/sec, find the peak emf induced in the coil.Explanation / Answer
magnetic field inside the solenoid, B = mue*n*I (n is no of turns per meter and I is current)
= 4*pi*10^-7*5*10^7*16
= 1005.3 T
A) magnetic flux passing through each loop = A*B (here A is area of loop)
= 0.05^2*1005.3
= 2.513 Wb
B) maximum induced emf = N*A*B*w
= 5*0.05^2*1005.3*10
= 125.7 volts
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