Explain ETS.

Oxygen is critical for aerobic respiration. Explain its role with respect to ETS.

Explain heat engines ? Explain its working.

Explain : Rutherford atomic model can not explain stability of an atom

Explain AC voltage applied to a resistor and explain it with necessary graph.

Explain the construction and working of an ideal lever and also explain the principle of moment of force.

Explain - ''Changing electric field produces magnetic field''. Explain importance of this statement.