Two circular loops of wire with small bulbs in them are sitting beside two long

Question

Two circular loops of wire with small bulbs in them are sitting beside two long straight current -carrying wires. In both cases, these loops are the same distance away from the current-carrying wires The wire loops, bulbs, and long straight wires are identical for the two situations but the currents in the straight wires are different. A graph of current in each wire as a function of time is shown at the right below For each labeled time t_1-t_2. state whether the brightness of bulb A b greater than, kit than, or equal to the brightness of bulb B. If either bulb b not lit at all at that time, state that explicitly. Time t_1 Time t^2 Time t_3 time t_4: Time t_5. Find the direction of current flow in the bulbs during each time internal.

Explanation / Answer

From times 1 to 4 both currents are positive (counterclock wise) current in A is larger than current in B so A is brighter than B in does intervals. At t5 the current in A is almos zero (it could be taken as if the bulb is not lit) and the current in B has now changed direction(clockwise) but since the current is bigger, bulb B is brighter than A

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