Name the factors on which the force acting on a current-carrying conductor placed in a magnetic field depends.

Define magnetic field. $A$ compass needle gets deflected when brought near a bar magnet. Why? List three properties of magnetic field lines.

$A$ square coil moves in a plane with uniform velocity $v$ parallel to its sides. $A$ magnetic field $B$ points perpendicular and into the loop. What is the induced current in the coil?

Which is the direction of magnetic force acting on a current-carrying wire placed in a magnetic field?

Explain the meanings of the words "electromagnetic" and "induction" in the term electromagnetic induction. List three factors on which the value of induced current produced in a circuit depends. Name and state the rule used to determine the direction of induced current. State one practical application of this phenomenon in everyday life.

If the key in the arrangement (Figure) is taken out (the circuit is made open) and magnetic field lines are drawn over the horizontal plane $ABCD$,the lines are