Question
Physics Question on Current electricity
Figures below show four ways of making a regular hexagon out of wires of two different kinds P, Q with current beafls at the middle of opposite wires, the magnetic field at the centre of the hexagon is not zero in
A
case a only
B
cases a and b only
C
case c only
D
cases c and d only
Answer
cases c and d only
Explanation
Solution
(c) and (d) do not show symmetry of arrangement.