Silicon Controlled Rectifier (SCR) Quiz

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Silicon Controlled Rectifier (Scr) Quiz - Quiz

Do you understand the functionality and configuration of SCR? Take this Silicon Controlled Rectifier (SCR) quiz to test your knowledge. A silicon-controlled rectifier is a four-layer solid-state current-controlling device. You must try this quiz to see what you know and what more you need to learn. All the best for a perfect score on this quiz! Do not forget to share the quiz with others who are into designing circuits and configurations.


Questions and Answers
  • 1. 

    Silicon controlled rectifier (SCR) is also known as _________.

    • A.

      Semiconductor conducting rectifier

    • B.

      Semiconductor controlled resistor

    • C.

      Semiconductor controlled rectifier

    • D.

      None of the above

    Correct Answer
    C. Semiconductor controlled rectifier
    Explanation
    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.

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  • 2. 

    SCR has ________ layers.

    • A.

      1

    • B.

      2

    • C.

      3

    • D.

      4

    Correct Answer
    D. 4
    Explanation
    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.

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  • 3. 

    SCR is a _______ type of device.

    • A.

      Resistor

    • B.

      Diode

    • C.

      Thyristor

    • D.

      Capacitor

    Correct Answer
    C. Thyristor
    Explanation
    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.

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  • 4. 

    What are the terminals of SCR? 

    • A.

      Anode, Cathode and Gate

    • B.

      Anode and Cathode

    • C.

      Collector, Base and Emitter

    • D.

      Drain, Source and Gate

    Correct Answer
    A. Anode, Cathode and Gate
    Explanation
    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.

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  • 5. 

    Power Electronics can be defined as

    • A.

      A conversion of DC power supply to AC power supply

    • B.

      A conversion of AC power supply to AC power supply

    • C.

      A technology of converting electric power from one supply to another supply using electronic power devices.

    • D.

      A conversion from Alternating Current to Direct Current of Power Supply

    Correct Answer
    C. A technology of converting electric power from one supply to another supply using electronic power devices.
    Explanation
    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.

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  • 6. 

    Reverse blocking type mode is also called as _______ state.

    • A.

      On state

    • B.

      Off state

    • C.

      Both a & b

    • D.

      Zero stage

    Correct Answer
    B. Off state
    Explanation
    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".

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  • 7. 

    The principle of SCR was developed by Goldey, Tanenbaum, Holonyak, and Moll in which year?

    • A.

      1956

    • B.

      1962

    • C.

      1998

    • D.

      1999

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

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  • 8. 

    A silicon controlled rectifier (SCR) is a_______

    • A.

      Unijunction device

    • B.

      Device with four junction

    • C.

      Device with three junction

    • D.

      None of the above

    Correct Answer
    C. Device with three junction
    Explanation
    An SCR is a device with three junctions.

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  • 9. 

    The electronic devices below are unidirectional devices except:

    • A.

      Diode

    • B.

      Silicone Controlled Rectifier

    • C.

      TRIAC

    • D.

      All of the above

    Correct Answer
    C. TRIAC
    Explanation
    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.

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  • 10. 

    Diode pass _________ in one direction.

    • A.

      Current

    • B.

      Voltage

    • C.

      Resistance

    • D.

      Watt

    Correct Answer
    A. Current
    Explanation
    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.

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