Question

Suppose the 19 Ω resistor of the previous problem is disconnected. Find the current through P2Q2 in the two situations (a) and (b) of that problem.

Answer 1

No Current Flows in Wires with Same Direction

Explanation:

(a)When the wires move in the same direction, their polarity remains the same

Therefore, no current flows in the circuit.  As Circuit being in-complete.

(b) When the wires move in opposite directions, their polarities are reversed. Thus, current flows in the circuit.

$V_P_2_Q_2$ = Blv  

= $1 \times 0.04 \times 0.05$

= $2 \times 10^-^3$ V

R = $2\Omega$  

Current in the circuit is given by-

i = $\frac {2 \times 10^-^3}{2}$

= $1 \times 10^-^3 A$= 1mA