Draw the magnetic field lines around a straight current carrying conductor.

The image formed by a concave mirror is observed to be real, inverted and larger than the object. Where is the object placed?

OR

Name the part of a lens through which a ray of light passes without suffering any deviation.

In the arrangement shown in figure there are two coils wound on a non- conducting cylindrical rod. Initially the key is not inserted in the circuit. Later the key is inserted and then removed shortly after.

What are the two observations that can be noted from the galvanometer reading

Two unequal resistances are connected in parallel. If you are not provided with any other parameters (eg. numerical values of I and R), what can be said about the voltage drop across the two resistors?

OR

Some work is done to move a charge Q from infinity to a point A in space. The potential of the point A is given as V. What is the work done to move this charge from infinity in terms of Q and V?

Veins are thin walled and have valves. Justify