Define the power of a lens. Write its S . I . Unit .

Define power of a lens and write its unit

Define the term wave velocity. Write its S.I. unit.

Define the term amplitude of a wave. Write its S.I. unit.

Define the term amplitude of a wave. Write its S.I. unit.

What is meant by power of a lens? Write its SI unit. A student uses a lens of focal length 40 cm and another of -20 cm . Write the nature and power of each lens.

Define moment of couple. Write its S.I unit.

Define power of a lens. What is its unit ? One student uses a lens of focal length 50 cm and another of - 50 cm . What is the nature of the lens and power used by each of the them ?

Define one dioptre of power of a lens.

Define self-inductance of a coil . Write its S.I. units ?

Define self-inductance of a coil . Write its S.I. units ?