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Dec 9, 2019 · Answer: ASEAN was established to accelerate economic growth and through that social progress and cultural development. Question 2. What does the logo on the ASEAN flag symbolise? (All India 2016) Answer: On the ASEAN logo, the ten stalks of paddy (Rice) represent the ten South East Asian countries bound together in friendship and solidarity.
Dec 9, 2019 · Answer: Disarmament requires all states to give up certain types of weapons. For instance, the 1972 Biological Weapons Convention (BWC) and 1992 Chemical Weapons Convention (CWC) banned the production and possession of these weapons. Question 4. Mention any two new threats to the security of a state. (All India 2013) Answer:
- Security mainly refers to freedom from threats. Existence of human being and life of a country is full of threats, concludingly, security is relate...
- Cooperative security means to achieve security with the help of cooperation among the countries at the bilateral, regional or global level. It may...
- Balance of power refers to the maintenance of balance of military power in comparison to a neighbouring country. The governments have to be very ca...
- An association or an alliance is a partnership of states that coordinate with each other to deter and defend against military attack. This is done...
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Sep 30, 2019 · Answer: As a supernational organisation, the European Union bears economic, political diplomacy and military influence as a regional organisation in the following manner: 1. Economic Influence: (а) Three times larger share in world trade than the US.
- ‘ASEAN WAY’ is an interaction that is informal, confrontationist and cooperative to promote supernational structures in the Association of South Ea...
- The circle with golden stars on the European Union flag stands for solidarity and harmony between the people of Europe.
- European Union is a group of European capitalist countries established in 1992 for common goal of foreign and security policy, cooperation and home...
- Marshall Plan was introduced by America to provide financial help for revival of European economy.
Class 12 Physics (India) Electric charges and field Electrostatic potential and capacitance Current electricity Moving charges and magnetism Magnetism & matter Electromagnetic induction Alternating current. Electromagnetic waves Ray optics and optical instruments Wave optics Dual nature of radiation and matter Atoms Nuclei Semiconductors.
- Ncert Class 12 Physics Chapter 14 Notes
- Classification of Metals, Semiconductors and Insulators
- Classification on The Basis of Energy Bands
- Types of Semiconductors
- P-N Junction Formation
- Diffusion Current
- Forward Biasing
- Reverse Biasing
- Zener Diode
- Zener Diode as Voltage Regulators
Earlier electronic devices were made up of vacuum tubes or valves. Vacuum tubes or Valves: 1. The evolution of vacuum tubes started with diodes and proceeded to date with triode, tetrode and pentode. 2. Valves are responsible for controlling the flow of electrons. In diodes there used to be two electrodes i.e. cathode and anode. 3. Similarly, triod...
On the idea of physical phenomenon According to the physical phenomenon of cloth, we will simply tell whether or not it is classified as metals, semiconductors or insulators. The electrical physical phenomenon is mostly diagrammatic by σ whereas the reciprocal of physical phenomenon is electric resistance and is diagrammatic by ρ = 1/σ ● Metals – M...
Depending upon the relative position of the valence band and the conduction band, the solids are classified into three categories i.e. conductors, insulators and semiconductors.
We have two types of semiconductors, these are Intrinsic semiconductors and Extrinsic semiconductors. Intrinsic semiconductor 1. A pure semiconductor that is free from impurities is called an intrinsic semiconductor. 2. The electrical conductivity of a pure semiconductor is known as intrinsic conductivity. Crystalline structure At temperature 0K 1....
A p-n junction is the basic building block of many semiconductor devices like diodes, transistors etc.The holes are the majority carriers in the p-type semiconductor whereas the electrons are the majority carriers in the n-type semiconductor.It is due to the motion of charge carriers due to the difference in concentration in two regions of the p-n junction, across the junction.The diffusion leaves behind a positive charge on the n-side close to the junction. This positive charge known as an ionised donor is immobile due to bonding with the surrounding atoms.Similarly, in the p-region near the junction, there is a negative charge or acceptor ions that are immobile.When we connect the positive terminal of the external battery to the p-side and the negative terminal of the external battery to the n-side, the p-n junction is said to be forward-biased.
When we connect the positive terminal of the external battery to the n-side and the negative terminal of the external battery to the p-side, then the p-n junction is said to be reverse biased.
It is a special purpose diode. It is named after the discoverer C. Zener.It is specially designed to operate under reverse bias in the breakdown region.The symbol for the Zener diode isThe above circuit represents Zener diodes as voltage regulators. Here, Zener voltage should be equal to the load voltage. The value of the series resistor is Rs=(VL-VZ)/ILwhere V is voltage, I is current
Apr 24, 2024 · April 24, 2024. in 12th Class. NCERT Books for Class 12 are available for download as PDF here at aglasem.com. The NCERT Class 12 New Book 2024 is the latest updated version of textbooks by National Council of Educational Research and Training. These Class 12 NCERT Books are available in English and Hindi.
Class 12 Political Science NCERT Books. Political Science / Civics Book Class 12 Free PDF Download. Political Science Part I. Chapter 1 – The Cold War Era. Chapter 2 – The End of Bipolarity. Chapter 3 – US Hegemony in World Politics. Chapter 4 – Alternative Centres of Power. Chapter 5 – Contemporary South Asia.
