Define- Vector.

Define electric field write its formula vector form.

Define electric potential difference between two points in an electric field. Is it a scalar or vector?

While rotating an object or while openning a door or a water tap we apply a force or forces. Under which conditions is this process easy for us? Why? Define the vector quantity concerned. How does it differ for a single force and for two opposite forces with different lines of action?

Define the terms : (i) Uniform circular motion (ii)Radius vector (iii) period (iv) Angular speed (v) Centripetal acceleration (vi) Centripetal force.

Define Metabolism

Define photoperiodism.

Define evolution.

Define potentiometer.

Define Anatomy.

Define Phytohormones.