A circular coil is made of N turns of copper wire as shown in the figure. A resi

Question

A circular coil is made of N turns of copper wire as shown in the figure. A resistor R is inserted in the copper wire. Initially, a uniform magnetic field of magnitude B points horizontally from left-to-right through the perpendicular plane of the coil. When viewed from the right the coil is wound counter-clockwise. During a time interval t the field uniformly changes at a constant rate, until a reversed field is reached equal in magnitude to the initial field. The electrons in the resistor, R, shown in the figure 1. move right-to-left. 2. move in a direction that is undeterminated from the information given. 3. do not move in a preferred direction, since they have thermal kinetic energy. 4. move left-to-right.

Explanation / Answer

according to lenz law ,

direction of currnet in coil will be right to left,

so direction of electrins is oppsoite of current,.

so direction of electrons = left to right

Option 4,

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