What is the working principle of transformer Class 10?

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 is the basic principle of transformer?

Principle – A transformer works on the principle of mutual induction. Mutual induction is the phenomenon by which when the amount of magnetic flux linked with a coil changes, an E.M.F. is induced in the neighboring coil. A transformer is made up of a rectangular iron core.

What is the principle of potentiometer?

The principle of a potentiometer is that the potential dropped across a segment of a wire of uniform cross-section carrying a constant current is directly proportional to its length. The potentiometer is a simple device used to measure the electrical potentials (or compare the e.m.f of a cell).

What are the 3 types of transformers?

There are three primary types of voltage transformers (VT): electromagnetic, capacitor, and optical. The electromagnetic voltage transformer is a wire-wound transformer. The capacitor voltage transformer uses a capacitance potential divider and is used at higher voltages due to a lower cost than an electromagnetic VT.

What are the main parts of transformer?

There are four primary parts to the basic transformer. The parts include the Input Connection, the Output Connection, the Windings or Coils and the Core. Input Connections – The input side of a transformer is called the primary side because the main electrical power to be changed is connected at this point.

Which wire is used in potentiometer?

By which material does the wire in the potentiometer is made up of. In general alloys like constantan or manganin are used as potentiometer wire . Constantan or manganin wire posses low temperature coefficient.

What is application of potentiometer?

The potentiometer is used as a voltage divider in the electronic circuit. The potentiometer is used in radio and television (TV) receiver for volume control, tone control and linearity control. The potentiometer is used in medical equipment. It is used in wood processing machine. It is used in injection mold machines.

What are 2 types of transformers?

Transformers generally have one of two types of cores: Core Type and Shell Type. These two types are distinguished from each other by the manner in which the primary and secondary coils are place around the steel core.

What are the applications of Transformers?

Transformers are most commonly used for increasing low AC voltages at high current (a step-up transformer) or decreasing high AC voltages at low current (a step-down transformer) in electric power applications, and for coupling the stages of signal-processing circuits.

What are the two main types of transformers?

There are two types of potential transformers; the conventional wound type (or electromagnetic type) and the capacitor voltage (potential) transformer.

What is the formula of potentiometer?

A potentiometer consists of a long wire with uniform area of cross section which is made up of manganin or constantan. Potential gradient (K) is the potential drop per unit length. It is calculated as V/L, where V is the potential difference between two points and L is the distance between two points.

What are the 2 uses of potentiometer?

The applications (uses) of the potentiometer:

• Voltage divider: The potentiometer can be used as a voltage divider to change the output voltage of a voltage supply.
• Audio control: Sliding potentiometers are commonly used in modem low-power audio systems as audio control devices.

How is the working principle of autotransformer similar to conventional transformers?

The working principle of autotransformer and construction is similar to that of conventional two winding transformers. However, it differs in the way in which the primary and the secondary are inter-related.

How does a starter work with an auto transformer?

Such starters consist of an auto-transformer, with necessary arrangements. At the time of starting, a reduced voltage is applied across the motor through the tappings of the autotransformer. The motor gets a lower starting voltage according to the selection of the tapping.

What are the disadvantages of an autotransformer?

One another major disadvantage of an autotransformer is that the secondary is not isolated electrically from its primary. When we are using it as a step-down transformer, the secondary may cause severe electrical shock, even if it making a very small voltage (say 25 V).

What’s the difference between an Uto transformer and an auto transformer?

Auto Transformer. An A uto Transformer is a transformer with only one winding wound on a laminated core. An auto transformer is similar to a two winding transformer but differ in the way the primary and secondary winding are interrelated. A part of the winding is common to both primary and secondary sides.