Class 8 Science Chapter 12 MCQ

An electroscope is a device, which is used to test whether an object is charged or not. It consists of closely place two metallic strips. When both the strips are charged with similar charges, they repel each other and become wide open.

Here, all the statements are correct. Hence, your answer will be option [D].

Two bodies must be joined by any conducting wire i.e., copper wire for the flow of current.

When we rubbed a glass rod with silk cloth, the glass rod becomes positively charged. The silk cloth becomes negatively charged. The electric charges generated by rubbing are static electric charges. These electric charges remain bound on the surface of the charged object

Here, all the statements are correct. Hence, your answer will be option [D].

When the earth’s plate brush past one another or under group collision, causes earthquake. An “earthquake” can cause huge damage to buildings, dams, etc.

The electric charges generated by rubbing are static electric charges. There are two types of charges; “Positive Charge and Negative Charge”. All the objects like glass rod, silk cloth, rubber balloon, ballpoint pen etc., are made up of tiny particles called atoms. We know that positive electric charges called protons and negative electric charge is called electrons. The object which loses negatively charged electrons during rubbing, acquires a positive electric charge. The object which gains negatively charged electrons during the rubbing, acquires a negative electric charge.

Two charged objects may attract, if they carry opposite charges, while they repel. If they carry similar charges.

Benjamin Franklin is the scientist who showed that lightening is electric in nature. He discovered many things about lightening and was the first to show that a thunderstorm lets out electricity.

Here, all the statements are correct. Hence, your answer will be option [D].

Here, all the statements are correct. Hence, your answer will be option [D].

Since earthquakes are caused by the movement of plates, the boundaries of the plates are weak zones where earthquake are more likely to occur. These weak zones are also known as seismic zones or fault zones.

Here, all the statements are correct. Hence, your answer will be option [D].

The outermost layer of the earth is called “crust”. It is also known as earth’s crust.

The epicentre is the point on the “earth’s surface” vertically above the hypocentre (or focus), point in the crust where a seismic rupture begins.

Earthquake is a sudden shaking or trembling of the earth due to the collision between the earth’s plate or brushing past of one plate over the other. It can cause Tsunami, floods and landslides.

The process of electric discharge occurs between the earth and the clouds and ultimately leads to the lighting.

When we comb dry hair with plastic comb, friction takes place between two objects. Due to friction, hair losses some electrons to plastic comb. Due to loss of electron, the hair becomes positively charged and due to gain of electron, plastic comb becomes negatively charged.

Here, all the statements are correct. Hence, your answer will be option [D].

A charged balloon and a charged ballpen refill having unlike charges or different charges, they attract each other. Remember, unlike charges are also called opposite charges. So, opposite charges attract each other.

Here, all the statements are correct. Hence, your answer will be option [D].

Focus of an earthquake is located deep under the ground. Focus is the point inside the crust where the pressure is released. The point on the earth’s surface above the focus is called the epicenter.

A ballpoint pen refill can be charged by rubbing it against the wool cloth. It becomes negatively charged.

Here, all the statements are correct. Hence, your answer will be option [D].

Here, all the statements are correct. Hence, your answer will be option [D].