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Electric charge
Chapter 1
| Question | Answer |
|---|---|
| What is electrically neutral? | The object with equal amount of two kinds of charges is called electrically neutral. |
| What is electrically charged? | The object with imbalance amount of two kinds of charges is called electrically charged. |
| What is electrostatics? | The study of electric charges at rest under the action of electric forces is called electrostatics. |
| What is the charge of an electron and proton? | 1.6 * 10^-19C |
| What is the mass of an electron? | 9.1 * 10^-31 |
| What is the mass of a proton? | 1.67 * 10^-27 |
| What is electric monopole? | An isolated single charge is called an electric monopole. |
| What is electric dipole? | Equal positive and negative charges having constant separation between them is called electric dipole. |
| What is electric quadrupole? | Two oppositely directed dipole close to each other is called electric quadrupole. |
| What are conductors? | The materials through which charges can easily flow are called conductors. Example: Copper and Aluminum |
| What are semi-conductors? | The partial conductors are called semi-conductors. Example; Silicon and germanium |
| What are insulators? | The materials through which charges cannot flow are called insulators. Example:Glass and Plastic |
| What is Coulomb's law? | The electric force between two point charges is directly proportional to the product of magnitude of charges and inversely proportional to the square of distance between them. |
| What is radio active decay? | In this process, a nucleus transforms into different type of nucleus. |
| What is annihilation of matter? | In this process, an electron having charge -e and its anti-particle called positron having charge +e annihilate in such a way that they transform into two gamma rays. |
| What is pair production? | In this a gamma ray transform into a positron and an electron. |
| What is charge quantization? | When a physical quantity exists in discrete packets, it is called quantized. Example; Charge, energy of photons, frequency of vibration of stretched string and angular momentum of electrons in an orbit. |
| What is charge conservation? | A physical quantity is said to be conserved, when total amount of physical quantity remain constant before and after change. Example: Charge and energy are conserved in pair production and annihilation of matter. |
Created by:
Raquel34
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