Which charge is inducted win the lower edges of the clouds?

What charge is inducted the upper edges of the clouds?

The angle of elevation of a cloud from a point h metres above a lake is 45^@ and the angle of depression of its reflection in the lake is 60^@ . Which of the following is the height of the cloud?

What kind of charges are produced at the near end and at the far end of a conductor due to induction?

A double-decker bus carry (u+l) passengers, u in the upper deck and l in the lower deck. Find the number of ways in which the u+l passengers can be distributed in the two decks, if r(lt=l) particular passengers refuse to go in the upper deck and s(lt=u) refuse to sit in the lower deck.

Passengers are to travel by a double decked bus which can accommodate 13 in the upper deck and 7 in the lower deck. Find the number of ways that they can be distributed if 5 refuse to sit in the upper deck and 8 refuse to sit in the lower deck.

Which ray is negatively charged?