Electrostatics

What is polarization in electrostatics?

• The movement of electrons in a conductor due to an applied voltage.

• The redistribution of electric charges in an object due to the influence of a nearby charged object.

• The process of charging an object by rubbing it with another object.

• The attraction or repulsion between two charged objects.

What is the principle of conservation of charge?

• The total electric charge in an isolated system remains constant.

• Electric charge can be created and destroyed.

• The total charge in a closed system can vary over time.

• Charge is always transferred from one object to another.

What is the role of static electricity in everyday life?

• It causes static cling and lightning.

• It is used to power electronic devices.

• It helps in cooking food faster.

• It prevents the formation of clouds.

What happens when two objects with like charges come close to each other?

• They attract each other.

• They repel each other.

• They neutralize each other.

• They combine to form a new charge.

What happens when two objects with opposite charges come close to each other?

• They repel each other.

• They attract each other.

• They have no effect on each other.

• They explode.

What is a conductor?

• A material that allows electric charges to flow freely, such as metals.

• A substance that prevents the flow of electric charges, like rubber.

• A type of electrical device that stores energy, such as a battery.

• A material that only allows heat to pass through, like glass.

What is an electric field?

• A region around a charged object where other charged objects experience a force.

• A type of energy that can be stored in batteries.

• A measure of the voltage in a circuit.

• A phenomenon that occurs only in magnetic materials.

What is grounding?

• The process of connecting an object to the Earth to neutralize its charge.

• A method of increasing electrical resistance in circuits.

• The act of isolating electrical components from each other.

• A technique used to amplify electrical signals.

What is the effect of rubbing a balloon with wool?

• The balloon becomes positively charged, and the wool becomes negatively charged.

• The balloon becomes negatively charged, and the wool becomes positively charged.

• The balloon remains neutral, and the wool becomes charged.

• Both the balloon and the wool become negatively charged.

What is the unit of electric charge?

• Ampere (A)

• Volt (V)

• Coulomb (C)

• Ohm (Ω)