There is a hormone which regulates carbohydrate, protein and fat metabolism in our body. Name the hormone and the gland which secretes it. Why is it important for us to have iodised salt in our diet?

An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position of the image formed by the mirror.

In the given circuit calculate the power consumed in watts in the resistor of 2 Ω:

(a) Two magnetic field lines do not intersect each other. Why?

(b) How is a uniform magnetic field in a given region represented? Draw a diagram in support of your answer