Photovoltaic Cells (Solar Cells)

Definition: Photovoltaic cells are basically those semiconductor devices that show sensitivity towards the light. It has the ability to change radiation energy into equivalent electrical energy. The name of the device itself shows its operation. As the word photo is used for light and voltaic is used for electricity. Photovoltaic cells are also known as solar cells …

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Thyristor (SCR)

Definition: Thyristor (SCR) is a semiconductor device that performs the action of switching as well as rectification. It is a 4 layer and 3 junction device formed by the combination of alternating p and n-type semiconductor material. Thyristor is a word formed by the merger of thyratron and transistor. As it exhibits the rectification action of …

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Phototransistor

Definition:  A Phototransistor is a device that has the ability to detect the level of the incident radiation and accordingly change the flow of electric current between emitter and collector terminal. It is a 3-layer semiconductor device that consists of a light sensitive base region. It is basically a transistor whose action depends on the application …

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Difference Between Amplitude Modulation and Frequency Modulation

Amplitude and frequency modulation are the two techniques used to modulate a signal in order to have long distance as well as proper transmission. The major difference between amplitude modulation and frequency modulation lies in the method of modulating the signal. In amplitude modulation, variation in amplitude of carrier signal according to the message signal …

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Difference Between RTD and Thermistor

Both RTD and Thermistor are used to detect the change in temperature. However, the crucial difference between RTD and Thermistor lies in the material of their construction. RTD is constructed with materials that are pure metals whereas thermistors are fabricated with semiconductor materials of ceramic or polymers. Also the two shows variation according to the …

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Waveguides

Definition: Waveguides are a special category of transmission line that is used to guide (direct) the waves (radiation) along the length of the tube. These are typically hollow metallic tube which acts as the medium to transfer or transmit the power. In waveguides, the energy is propagated through a tube. It can be either rectangular …

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Transducers

Definition: Transducers are the device that is used for the conversion of energy from one form to another different but equivalent form. In terms of instrumentation, more specifically we can say, transducers are the devices that change non-electrical quantity into its electrical equivalent form. The converted form of energy by any transducer can also be …

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Difference Between Conductor, Semiconductor and Insulator

The crucial difference between conductor, semiconductor and insulator rely on their level of conductivity. Conductors are basically the materials that allow easy flow of electric current, hence exhibiting high conductivity, semiconductors are the materials that possess moderate conductivity. As against, insulators are the materials that prevent the flow of charge through them, thus exhibiting low …

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