Lightning strikes only on high - rise buildings

Assertion: The lightening conductor at the top of high building has sharp pointed ends. Reason: The surface density of charge at sharp points is very high resulting in setting up of electric wind.

What is lightning conductor ? How does it save high-rise buildings from lightning damage ?

Foundations of high rise building are small. True/False.

A particle is projected up with initial speed u=10 m s^(-1) from the top of a bitlding at time t=0 . At time t=5 s the particle strikes the fround. Find the height of the building. .

A steel ball is dropped from th roof of a building. A man standing in front of a 1-m high window in the building notes tha the ball takes 0.1 s to the fall from the top to the boottom of the window. The ball continues to fall and strikes the ground. On striking the ground, the ball gers rebounded with the same speed with which it hits the ground. If the ball reappears at the bottom of the window 2 s after passing the bottom of the window on the way down, dind the height of the building.

A girl is standing on the top edge of an 18 m high building. She tosses a coin upwards with a speed of 7.0ms^(-1) .How long does it take for the Coin to hit the ground ?How fast is the coin going just before it strikes the ground? ( g=10ms^(-2))

A body falls from the top of a building and reaches the ground 2.5 s later. How high is the building ? (Take g = 9.8 m s^(-2) )

A stone of weight of 2 kgf is lying on the roof of a building 60 m high. Calculate the amount of stored energy in the stone. [Take 1 kgf=10N]

What is lightning (b) How do the clouds get electrically charged ? (c) How does lightning strike a building ?

How does a lightning conductor protect buildings from lightning?