Answer the following questions :
Draw the diagram of a DC generator . Then explain as to how the DC current is obtained.

Answer the following questions : What is a DC generator?

Answer the following questions : State one advantage of AC over DC.

Answer the following questions : Draw neat labelled diagrams : Types of lenses.

Answer the following questions : Explain with a diagram : Kepler's three laws.

Answer the following questions : What is a direct current (DC)?

Answer the following questions : Name the following diagrams and explain the concept behind them.

Answer the following questions : Explain how dew and fog are formed .

Answer the following questions : Draw a ray diagram to show image formation by a concave lens .

Answer the following questions : Draw a figure explaining various terms related to a lens.

Answer the following questions : Observe the diagrams and answer the questions. Which effect of electric current is shown in the above figure ?