Question

Two wires MACN and MBDN, of the same length but of different resistances $R_1$ and $R_2$ are connected as shown in the figure. Contacts A, B, C and D are arranged so that there is no current passing through wires AB and CD? Will current pass through AB and CD with this arrangement of contacts if two points E and F on these wires are connected?

• A. Current will pass through AB, CD
• B. Current will not pass through AB, CD
• C. Current will pass through AB but not CD
• D. Current will pass through CD but not AB

Answer 1

The correct option is A

Current will pass through AB, CD

Initially A, B at same potential $V_1,C,D$ at same potential $V_2(V_1>V_2)$ after E, F contacts current is passing through AB, CD