Referring to the loops of conductors shown in the figure, what is the direction

Question

Referring to the loops of conductors shown in the figure, what is the direction of the current induced coil 2: (a) if the current in the coil 1 increases? (b) if the current in coil 2 decreases ? (c) if the coil in the coil 1 is constant? A lightning bolt produces a rapidly varying magnetic field. If the bolt strikes the earth vertically and acts like a current in a long straight wire, it will induce a voltage in a loop aligned like in the figure. What voltage is produced in a 0.500 m diameter loop 75.0 m from a 3.00 times 10^6 A strike if the current falls to zero in 35.00 us ? What is the direction of induced current in the coil? Consider the arrangement shown in the figure. Assume R = 10.0 Ohm, 1 = 1.35 m, and a uniform magnetic field of 2.30 T is directed into the page. At what speed should the bar be moved to produce a current of 0.750 A in the resistor. Find the direction of current in the loop and the magnetic force acting on the conductor.

Explanation / Answer

5a) According to Lenz's Law

When it increase the current in coil 2 flows in the same direction as in coil 1 to form similar pole to oppose the incresed flux through it

When it decreses the current in coil 1 flows in opposite direction as in coil 1 to form opposite pole to oppose the decreasing flux

No current is produced as change in flux is zero

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