Some Natural Ph...

When an uncharged body B is brought in contact with a positively charged body A, then

Statement A: positive charge will flow from A to B
Statement B: electrons will flow from B to A

The electric charge acquired by a glass rod when rubbed with a silk cloth is

Directions: Read the given passage and answer the question.

Rahul first rubbed a glass rod with silk, then touched the rod with an electroscope. Then he rubbed an ebonite rod with fur and brought it near the charged electroscope.

Statement A: The leaves of the electroscope will move further apart.
Statement B: The glass rod will become positively charged and the ebonite rod will become negatively charged.

Lightning and electric shock are examples of

Match Column-I with Column-II and select the correct answer:

Choose the correct statements from the following:

(A) A gold leaf electroscope is used to detect charges.
(B) The air in the path of the lightning becomes very cold.
(C) Like charges attract each other.
(D) Lightning conductors are used to protect a building from lightning.

Read the following statements and choose the correct option:

Statement A: To protect a building from lightning, a thick lightning rod, forked at top, is installed on the roof of the building down to earth.
Statement B: Sharp edges can hold a large amount of charge.

A and B are playing in a park with many tall trees. Suddenly lightning strikes in the sky. What would be the best possible precaution preferred by them at that time?

The rarest type of lightning is:

Where do positive charges accumulate on a cloud?

Raju rubbed a pen refill 'A' with polythene and placed it in a glass tumbler. He rubbed another pen refill 'B' with polythene and brought it close to that charged refill in the tumbler. What effect will be observed?

Directions: Read the following passage and fill in the blanks.

Earthquakes are caused because of the motion of the ___i___ plates in the outer crust of the Earth. The intensity of tremors is highest near the ___ii____. The place below the Earth's surface from where the earthquake originates is called ____iii____. It is often several kilometres below the Earth's surface.

Earthquake intensity is measured with the help of a

Directions: Read the following statements (A and B) and select the correct option.

Statement A: P waves are compressional waves which move the material in the same direction as wave movement.
Statement B: S waves are shear waves and move the material perpendicular to wave movement.

Refer to the figure below and match columns I and II.

Directions: Read the following statements (A and B) and select the correct option.

Statement A: Earthquake prone areas are the ones which are near the equator.
Statement B: Earthquakes occur when the temperature becomes very high.

Directions: Read the following statements (A and B) and select the correct option.

Statement A: Roof of the buildings in seismic zones should be light.
Statement B: During the earthquake, if the structure falls, the damage will not be heavy.

Choose the correct statement(s):

During an earthquake, if you are outdoors, then

A. find a clear spot, away from buildings, trees and overhead power lines; and drop to the ground
B. take shelter under a nearby tree
C. get into the car and drive away fast

How do rock particles move during the passage of a P wave through the rock?

Solid plates make up the layer P of the earth which are floating on partially molten rocks of layer Q. Q has R currents which are responsible for movement. Identify P, Q, and R respectively.