Two thick wires and two thin wires, all of the same materais and same length from a square in the three differenct ways, `P,Q` and `R` as shwon in figure with current connection shown, the magneitc feidl at the centre of the square is zero in cases.

Two thick wires and two thin wires, all of same material and same length from a square in three different ways P,Q and R as shown in the figure. With correct connections shown, the magnetic field due to the current flow at the centre of the loop will be zero in case of

Two thick wires and tow thin wires, all of same material and same length from a squre in the three different ways P, Q and R as shown. The current flowing through the arrangement is i. Let B_(P), B_(Q) and B_(R) represent the magnetic field at the centre of square in the three cases, then

Two thick wires and tow thin wires, all of same material and same length from a squre in the three different ways P, Q and R as shown. The current flowing through the arrangement is i. Let B_(P), B_(Q) and B_(R) represent the magnetic field at the centre of square in the three cases, then

Four very long, current carrying wires in the same plane intersect to form a square 40.0 cm on each side as shown in figure. Find the magnitude and direction of the current I so that the magnetic field at the centre of square is zero. Wires are insulated from each other.

Four very long, current carrying wires in the same plane intersect to form a square 40.0 cm on each side as shown in figure. Find the magnitude and direction of the current I so that the magnetic field at the centre of square is zero. Wires are insulated from each other.