Silicon Controlled Rectifier (SCR) Quiz

The terminals of an SCR (Silicon Controlled Rectifier) are the Anode, Cathode, and Gate. The Anode is the positive terminal, the Cathode is the negative terminal, and the Gate is the control terminal used to trigger the SCR into conduction.

A thyristor is a type of device that is used as a semiconductor switch. It is capable of controlling large amounts of electrical power and is commonly used in applications such as power control systems, motor drives, and voltage regulation. Unlike a resistor, diode, or capacitor, a thyristor can handle high currents and voltages and can be triggered to conduct current in one direction only. Therefore, the correct answer is thyristor.

A diode allows current to pass through it in one direction only. It acts as a one-way valve for electric current, allowing it to flow from the anode (positive terminal) to the cathode (negative terminal), but not in the reverse direction. This characteristic of a diode is due to its internal structure and the presence of a PN junction, which allows for the flow of current in one direction while blocking it in the opposite direction.

Reverse blocking type mode is also called the "off state" because in this mode, the device is in a non-conducting state or turned off. In this state, the device does not allow current to flow through it, effectively blocking the reverse current. This mode is opposite to the "on state" where the device is conducting and allows current to flow through it. Therefore, the correct answer for this question is "off state".

The correct answer is 4 because SCR (Silicon Controlled Rectifier) is a four-layer semiconductor device. It consists of three P-N junctions and four layers, namely P-N-P-N. The four layers allow for the control of current flow through the device, making it suitable for applications such as power control and switching.

The correct answer is "Semiconductor controlled rectifier." An SCR is a type of semiconductor device that acts as a rectifier, allowing current to flow in only one direction. It is controlled by a gate signal, which enables it to switch on and off. The term "semiconductor" refers to the material used in the construction of the SCR, which is typically silicon. Therefore, the term "semiconductor controlled rectifier" accurately describes the function and nature of an SCR. The other options, "semiconductor conducting rectifier" and "semiconductor controlled resistor," are not correct terms for an SCR.

An SCR is a device with three junctions.

Power Electronics is a technology that involves the conversion of electric power from one supply to another using electronic power devices. This field focuses on the efficient control and conversion of electrical energy, allowing for the manipulation and regulation of power flow. It encompasses various applications such as power converters, inverters, rectifiers, and motor drives. By utilizing electronic power devices like transistors and thyristors, Power Electronics enables the conversion and control of power in a wide range of electrical systems and devices.

The principle of SCR was developed in 1956 by Goldey, Tanenbaum, Holonyak, and Moll.

A unidirectional device is one that allows current to flow in only one direction. A diode and a Silicone Controlled Rectifier (SCR) are both examples of unidirectional devices as they only allow current to flow in one direction. However, a TRIAC is a bidirectional device, meaning it allows current to flow in both directions. Therefore, the correct answer is TRIAC, as it is the only device listed that is not unidirectional.