• #### Class 8 Science Study Material

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##### Rita combed her hair with a plastic comb. Then, she noticed that the comb could attract small pieces of paper. This occurs because

a) The comb acquires charges due to friction.
b) The comb acquires heat due to friction.
c) The paper acquires charges due to friction.
d) The paper acquires heat due to friction.

##### Mamta combed her hair with two plastic combs. If she brought the combs close to one another, the combs would

a) Acquire zero charge.
b) Attract each other.
c) Repel each other.
d) Experience zero force.

##### One end of a refill is rubbed vigorously with polythene. The same process is repeated on another refill. The rubbed ends are placed on a metallic plate. If they are brought close to one another, they will

a) Attract each other.
b) Repel each other.
c) Experience zero.
d) Retain their charges

##### An earthquake is

a) Phenomenon of discharge of electricity.
b) A sudden trembling of the earth.
c) The occurrence of high tides.
d) A disturbance in the earth`s rotation

##### In the buildings, in an earthquake prone region,

a) The cupboards and shelves should be attached to the walls.
b) The cupboards and shelves should be detached from the walls
c) The wall-clocks and photo-frames should be hung down a nail.
d) There should be less fire-fighting equipments.

##### During an earthquake, we should rush

a) Into a building.
b) Out in an open field.
c) Into an open vehicle.
d) Into a park full of trees

##### When an ebonite rod is rubbed with some piece of flannel, the type(s) of the charges developed on the rod and the flannel is/are

a) Positive charges.
b) Negative charges
c) Positive and negative charges, respectively.
d) Negative and positive charges, respectively

##### During the separation of charges in the formation of thunderstorms, positive and negative charges are collected at

a) The lower and upper edges of clouds, respectively.
b) The middle of clouds.
c) The upper and lower edges of clouds, respectively.
d) The lower edges of the clouds.

##### A copper ball is given some negative charge. Then, it is placed on a plastic stool placed on the ground. The final charge on the ball will be

a) Positive in nature but greater in magnitude.
b) Negative in nature but smaller in magnitude.
c) Zero.
d) Equal to the initial charge in magnitude and nature.

##### A copper ball is given some negative charge. Then, it is placed on an iron stool placed on the ground. The final charge on the ball will be

a) Positive in nature.
b) Negative in nature.
c) Zero.
d) Equal to the initial value in magnitude.

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