The ripple factor of a full wave rectifier is approximately MCQ with Answer and Explanation

Explanation:
Force = rate of change of momentum = n × (mv) = nmv. This is average force required to hold gun.

Explanation:
Myopia (nearsightedness): image formed before retina, corrected with concave lens. Hypermetropia: cannot see near objects. Presbyopia age-related. Cataract lens opacity.

Explanation:
A liquid drop has only one free surface, so its excess pressure is P = 2T/R. However, a soap bubble in the air has two completely free surfaces (an inner one and an outer one). Because both surfaces exert surface tension forces inward, the total excess pressure inside a soap bubble is exactly double: P = 4T/R.