28.Two coils C1 and C2 are arranged coaxially as shown in the figure the ends of coil C2 are connected to an ammeter A. The current sent through coil C1 is directly proportional to the time. If magnetic field induction produced by the coil C1 is proportional to the current in it, then induced current through C2 is A) zero B) increasing with time C)constant D) decreasing with time

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Q. Two coils

C_{1} a n d C_{2}

are arranged coaxially as shown in figure The ends of the coil

C_{2}

are connected to an ammeter A The current sent through the coil

C_{1}

is directly proportional to the time If the magnitude field induction produced by the coil

C_{1}

is proportional to the current in it then the induced current through the coil

C_{2}

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 $I_{1} (t)$ starts flowing through the coil. If $I_{2} (t)$ is the current induced in the ring and B(t) is the magnetic field at the axis of the coil due to $I_{1} (t)$ , then the product of $I_{2} (t)$ and B(t)