Questions
A coil of wire having finite inductance and resistance has a conducting ring placed coaxially within it. The coil is connected to a battery at time t=0, so that a time dependent
current I1(t) starts flowing through the coil. If l2(t) is the current induced in the ring and B(t) is the magnetic field at the axis of the coil due to l1(t), then as a function of time (t > 0), the product I2(t) B(t)
detailed solution
Correct option is D
Using k1,k2 etc, as different constants. I1(t)=k11−e−t/τ,B(t)=k2I1(t)I2(t)=k3dB(t)dt=k4e−t/τ∴I2(t)B(t)=k51−e−t/τe−t/τThis quantity is zero for t = 0 and t = ∞ and positive for other value of t. It must, therefore, pass through a maximum.Talk to our academic expert!
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Two conducting circular loops of radii R1 and R2 are placed in the same plane with their centers coinciding. If , the mutual inductance M between them will be directly proportional to
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