Two coaxial coils carrying currents in the same direction are brought nearer. What will happen to the currents in them?

Two parallel wires carrying current in the same direction attract each other due to

Two infinitely long straight conductors carrying current in the same direction are placed parallel to each other. Then

The elctric current flowing in a wire in the direction B to A is decreasing. What is the direction of induced current in the metallic loop kept above it?

The magnetic field field produced at the centre of a circular coil carrying a current is 0.005T. Will the magnetic field change if both the number of turns and the current are doubled? (write yes or no)