What is a transformer class 12

Transformers step up (increase) or step down (decrease) AC voltage using the principle of electromagnetic induction - mutual induction. A changing current in the primary coil induces an e.m.f in the secondary. Since the e.m.f generated depends on the number of turns, the voltage induced in the secondary can be changed - stepped up or down - by altering the turn's ratio. Created by Mahesh Shenoy. 3:52, the expression given for the voltage in the primary coil is 'Np*e'(expanding to Vp = -NdΦ/dt), but if applying Lenz's law for this EMF generated, it shows that this expression is for the back EMF acting against the AC power source instead of the actual voltage. Can someone please explain how this expression shows the magnitude of the primary voltage, please? how do you run a microwave oven that requires thousands of volts and a phone which requires very tiny amount of voltage by plugging them both into the same supply 230 volts main supply i mean the voltage is too low to run a microwave so how does it work and the voltage is too high for our cell phones so why don't they blow up the secret is a transformer so what's a transformer a transformer is a device that can either step up which means increase or step down which means decrease step down and ac voltage okay what does that mean and how does it work well at the core the transformer is basically just two coils kept close to each other one which is connected to the supply and ac supply is called the primary coil and the oth...

Hint: In order to solve this question, we are going to firstly define the transformer in detail giving all its properties, functions and idea behind it. After that the transformers are divided based on the various factors that affect the transformers. The different types of transformers are given. Complete step-by-step solution: A transformer is a device used to step up or step down the voltage. In other words, it is a static device that changes the level of voltage between different circuits. The transformer is basically a voltage control device. It is widely applied for the distribution and transmission of the alternating current power. The main idea behind the use of a transformer is to maintain a balance between the electricity that is generated at very high voltages and the consumption that is done at very low voltages. The transformers are classified based on the voltage levels, medium of core used, winding arrangement and install location: Types of transformer: Based on the voltage levels: 1. Step – up transformer 2. Step down transformer Based on the medium of core used: 1. Air core transformer 2. Iron core transformer Based on the winding arrangement: 1. Autotransformer Based on the install location: 1. Power Transformer 2. Distribution Transformer 3. Measurement Transformers 4. Protection Transformers Note:It is to be noted that the transformer works on the principle of Faraday’s law of electromagnetic induction and mutual induction. In the transformer core, ther...

Types of Transformers Step-up Transformer converts a low voltage into a high voltage. The number of turns in the primary coil is less than the number of turns in the secondary coil, i.e. Np < Ns. Step-down Transformer converts a high voltage when current decreases into a low voltage when current increases. 24 Which is the most difficult chapter in class 12 physics? How do you make a transformer for a school project? Wrap two, equal-length bars of steel with a thin layer of electrically-insulating tape. Wrap several hundred turns of magnet wire around these two bars. You may make these windings with an equal or unequal number of turns, depending on whether or not you want the transformer to be able to “step” voltage up or down. How do I create a physics project for class 12? What is the principle of transformer class 12th physics? The transformer works on the principle of Faraday’s law of electromagnetic induction and mutual induction. There are usually two coils primary coil and secondary coil on the transformer core. The core laminations are joined in the form of strips. The two coils have high mutual inductance. What are the 3 types of transformers? Depending on the Power rating and specification, Power transformers can further be classified into three categories: Small power transformer, Medium Power transformers, and the Large power transformers. Which are the 6 types of transformers? The different types of transformer are Step up and Step down Transformer, Power Trans...