All Flashcards
What are the key differences between charging by contact and charging by induction?
Contact: Direct transfer of charge, object acquires the same charge as the charging object. | Induction: Charge redistribution, object acquires the opposite charge as the charging object, requires grounding.
Compare and contrast the movement of electrons when grounding a positively charged object versus a negatively charged object.
Positively charged object: Electrons flow from the ground to the object, neutralizing it. | Negatively charged object: Electrons flow from the object to the ground, neutralizing it.
Differentiate between charge conservation and charge quantization.
Charge Conservation: The total charge in an isolated system remains constant. | Charge Quantization: Charge exists in discrete units, multiples of the elementary charge.
What is the difference between charging by friction and polarization?
Friction: Involves the transfer of electrons between two objects in contact, resulting in a net charge on both objects. | Polarization: Involves the redistribution of charges within an object without a net charge change.
Compare the final charge of an object charged by contact versus by induction.
Contact: The object will have the same type of charge as the charging object. | Induction: The object will have the opposite type of charge as the charging object.
What are the steps involved in charging an object by friction?
- Rub two neutral objects together. 2. Electrons transfer from one object to the other. 3. One object becomes positively charged, and the other becomes negatively charged.
What are the steps involved in charging an object by contact (conduction)?
- Bring a charged object into contact with a neutral object. 2. Charge is transferred between the objects. 3. The objects end up with the same type of charge.
What are the steps involved in charging a neutral metal sphere negatively by induction using a positively charged rod?
- Bring the positively charged rod near the sphere (polarization). 2. Ground the sphere, allowing electrons to flow from the ground to the sphere. 3. Remove the ground connection. 4. Remove the rod; the sphere is now negatively charged.
Describe the process of charge redistribution when a positively charged rod is brought near a neutral metal sphere.
- The positively charged rod is brought near the neutral sphere. 2. Electrons in the sphere migrate towards the rod. 3. The side of the sphere near the rod becomes negatively charged, and the opposite side becomes positively charged.
What are the steps involved in grounding a positively charged metal sphere?
- Connect the positively charged sphere to the ground. 2. Electrons flow from the Earth to the sphere. 3. The sphere becomes neutralized.
Define electric charge.
A fundamental property of matter that governs electromagnetic interactions, causing attraction or repulsion.
What does it mean for charge to be 'quantized'?
Charge comes in discrete units, integer multiples of the elementary charge e ( C).
Define 'grounding' in the context of electrostatics.
Electrically connecting a charged object to a significantly larger, approximately neutral system (like the Earth).
What is 'polarization' in the context of electric charge?
A charged object induces a charge separation in a neutral object without direct contact.
Define 'net charge'.
The total amount of electric charge (positive or negative) present in an object or system.