CBSE Class 12 - Physics - Electric Charges And Fields - Very Short Q and A

Electric Charges And Fields

Very Short Q and A

Charging By Induction
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Q1: Define frictional electricity.

Answer: It is the electricity developed on bodies when they rubbed against each other.


Q2: What is the smallest amount of charge?

Answer: Charge on an electron or proton is ± 1.62 × 10^-19 C


Q3: State the two basic properties of electric charge?

Answer:  i. Electric charge is quantised.
ii. Electric charge is always conserved.



Q4: Define Dielectric constant.

Answer: The Dielectric constant of a medium is the ratio of the force between two charges placed at a certain distance apart in vacuum(or air) to the force between the same two charges at the same distance apart in that medium.


Q5: What is induction?

Answer: It is a process of charging a body without making physical contact.

CBSE Class 6 - Geography - CH3 - Motions Of The Earth (NCERT Q and A)

Motions Of The Earth

Four Seasons as seen from Northern Hemisphere

NCERT Chapter Q & A and Other Short Questions and Answers

Q1: What is the angle of inclination of the earth’s axis with its orbital plane? 

Answer: The angle of inclination of the earth's axis with its orbital plane is 66½°


Q2: Define rotation and revolution.

Answer: Rotation: It is the movement of the earth on its axis.
        Revolution: It is the movement of the earth around the sun in its orbit.


Q3: Name the two movements of the earth.

Answer: Rotation and Revolution.

Q4: The Earth moves like a spinning top. What is this movement called? What does it result in?

Answer: It is called rotation. It results in the formation of day and night.


Q5: In which direction the earth rotates? How much time does it take complete one rotation?

Answer: West to East. It takes 24 hours to complete one rotation.

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