A wire frame in the from of a tetrahedron `ABCD` is connected to a battery. The resistance of all the edges of the tetrahedom is equal. Indicate the edges of the frame whose removal does not affect `I` at all

Regular tetrahedron a tetrahedron whose all the edges are of equal length is called a regular tetrahedron.

A square frame with side 'a' and a straight conductor carrying a constant current I are located in the same plane. The resistance of the frame is equal to R . The frame was turned through 180^(@) about the axis OO' separated from the current-carrying conductor by a distance b=2a . If the electric charge that flowed through the frame be expressed as a function of a,I,R it takes the form q= constant xxa^(m)xxI^(n)xxR^(p) . Find m+n+p .

shows a long U shaped wire of widt l placed in a perpendicular magnetic field B. A wire of length l is slid on the U shaped wire with a constant velocity v towards right. The resistance of all the wires is r per unit length. At t =0, the sliding wire is close to the left edge of the U shaped wire. Draw an equivalent circuit diagram, showing the induced emf as a battery. Calculate the current in the circuit.

If the resistance of each edge of a cube shaped wire frame as shown in figure below is R, then the resistance between points 1 and 7 is

A Square frame with side a and a straigh conductor carrying a constant current I and located in the same plane. The inductance and the resistance of the frame are equal to L and R respectivaly. The frame was truned through I80^(@) about the axis OO' separated from the current carrying conductor by a distance b . Find the electric charge having flown through the frame.

A long straight wire carries a current I_(0) , at distance a and b=3a from it there are two other wires, parallel to the former one, which are interconnected by a resistance R (figure).A connector slides without friction along the wires with a constant velocity v .Assuming the resistance of the wires,the connector, the sliding contacts and the self-inductance of the frame to be negligible. The point of application (distance from the long wire) of magnetic force on sliding wire due to the long wire is (2a)/(lnx) from long wire.Then find out value of x .

A long U -shaped wire of width l placed in a perpendicular uniform and constant magnetic field B (figure).A wire of length l is slid on the U -shaped wire with a constant velocity v towards right.The resistance of all the wires is r per unit length.At t=0 , the sliding wire is close to the left edge of the fixed U -shaped wire.Draw an equivalent circuit diagram at time t , showing the induced emf as a battery.Calculate the current in the circuit.