Describe various types of epithelial tissues with the help of labelled diagrams.

Describe the internal structure of a dorsiventral leaf with the help of a labelled diagrams

Give Huygen.s principle with the help of a ray diagram.

Explain with the help of a labelled diagram the working of a transformer.

Observe the diagram and answer the questions below. Describe short circuit and overloading with the help of the given circuit.