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Assertion (A) : The operation of an SCR can be explained in a very simple way by considering it in terms of two transistors.
Reason (R) : in the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.
Reason (R) : in the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.
- a)Both A and R are true and R is the correct explanation of A.
- b)Both A and R are true but R is not the correct explanation of A.
- c)A is true but R is false.
- d)A is false but R is true.
Correct answer is option 'C'. Can you explain this answer?
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Assertion (A) : The operation of an SCR can be explained in a very sim...
In the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the base of the other and vice-versa as shown below. Thus, reason is a false statement.
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Assertion (A) : The operation of an SCR can be explained in a very sim...
Assertion (A): The operation of an SCR can be explained in a very simple way by considering it in terms of two transistors.
Reason (R): In the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.
The correct answer is option 'C' - A is true but R is false.
Explanation:
Understanding SCR:
- A Silicon Controlled Rectifier (SCR) is a three-terminal semiconductor device that acts as a switch. It is widely used in power control applications.
- An SCR consists of three layers of semiconductors - N-P-N or P-N-P. The middle layer is called the base or the control layer, and the outer layers are called the emitter and the collector.
- The SCR has three terminals - an anode (A), a cathode (K), and a gate (G). The anode and cathode are connected to the main circuit, while the gate is used to control the SCR.
Explanation of Assertion (A):
The assertion states that the operation of an SCR can be explained by considering it in terms of two transistors.
Explanation of Reason (R):
The reason states that in the two-transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.
Analysis of Assertion and Reason:
To analyze the assertion and reason, let's consider the two-transistor analogy of the SCR.
Two-Transistor Analogy of SCR:
- The SCR can be represented as two back-to-back transistors - an npn transistor and a pnp transistor.
- The npn transistor corresponds to the upper part of the SCR, with its emitter connected to the cathode (K) and its collector connected to the anode (A).
- The pnp transistor corresponds to the lower part of the SCR, with its emitter connected to the anode (A) and its collector connected to the cathode (K).
- The gate terminal (G) corresponds to the base terminals of both transistors.
Operation of SCR:
- The SCR behaves like an open circuit until a gate pulse is applied. Once a gate pulse is applied, the SCR turns on and starts conducting.
- When a positive gate pulse is applied to the gate terminal (G), it triggers the npn transistor. This causes a current flow from the anode (A) to the cathode (K).
- The current flow triggers the pnp transistor, completing the circuit and allowing a large current to flow through the SCR.
- Once the SCR is triggered, it remains in the conducting state even if the gate pulse is removed. It will continue to conduct until the current through it drops below a certain level called the holding current.
Conclusion:
In conclusion, while the assertion (A) is true, the reason (R) is false. Although the two-transistor analogy helps in understanding the operation of an SCR, it does not accurately represent the internal structure and mechanism of an SCR. The SCR is a three-layer device, and its operation is based
Reason (R): In the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.
The correct answer is option 'C' - A is true but R is false.
Explanation:
Understanding SCR:
- A Silicon Controlled Rectifier (SCR) is a three-terminal semiconductor device that acts as a switch. It is widely used in power control applications.
- An SCR consists of three layers of semiconductors - N-P-N or P-N-P. The middle layer is called the base or the control layer, and the outer layers are called the emitter and the collector.
- The SCR has three terminals - an anode (A), a cathode (K), and a gate (G). The anode and cathode are connected to the main circuit, while the gate is used to control the SCR.
Explanation of Assertion (A):
The assertion states that the operation of an SCR can be explained by considering it in terms of two transistors.
Explanation of Reason (R):
The reason states that in the two-transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.
Analysis of Assertion and Reason:
To analyze the assertion and reason, let's consider the two-transistor analogy of the SCR.
Two-Transistor Analogy of SCR:
- The SCR can be represented as two back-to-back transistors - an npn transistor and a pnp transistor.
- The npn transistor corresponds to the upper part of the SCR, with its emitter connected to the cathode (K) and its collector connected to the anode (A).
- The pnp transistor corresponds to the lower part of the SCR, with its emitter connected to the anode (A) and its collector connected to the cathode (K).
- The gate terminal (G) corresponds to the base terminals of both transistors.
Operation of SCR:
- The SCR behaves like an open circuit until a gate pulse is applied. Once a gate pulse is applied, the SCR turns on and starts conducting.
- When a positive gate pulse is applied to the gate terminal (G), it triggers the npn transistor. This causes a current flow from the anode (A) to the cathode (K).
- The current flow triggers the pnp transistor, completing the circuit and allowing a large current to flow through the SCR.
- Once the SCR is triggered, it remains in the conducting state even if the gate pulse is removed. It will continue to conduct until the current through it drops below a certain level called the holding current.
Conclusion:
In conclusion, while the assertion (A) is true, the reason (R) is false. Although the two-transistor analogy helps in understanding the operation of an SCR, it does not accurately represent the internal structure and mechanism of an SCR. The SCR is a three-layer device, and its operation is based
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Assertion (A) : The operation of an SCR can be explained in a very simple way by considering it in terms of two transistors.Reason (R) : in the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer?
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Assertion (A) : The operation of an SCR can be explained in a very simple way by considering it in terms of two transistors.Reason (R) : in the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Assertion (A) : The operation of an SCR can be explained in a very simple way by considering it in terms of two transistors.Reason (R) : in the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A) : The operation of an SCR can be explained in a very simple way by considering it in terms of two transistors.Reason (R) : in the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer?.
Assertion (A) : The operation of an SCR can be explained in a very simple way by considering it in terms of two transistors.Reason (R) : in the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about Assertion (A) : The operation of an SCR can be explained in a very simple way by considering it in terms of two transistors.Reason (R) : in the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Assertion (A) : The operation of an SCR can be explained in a very simple way by considering it in terms of two transistors.Reason (R) : in the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer?.
Solutions for Assertion (A) : The operation of an SCR can be explained in a very simple way by considering it in terms of two transistors.Reason (R) : in the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE).
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ample number of questions to practice Assertion (A) : The operation of an SCR can be explained in a very simple way by considering it in terms of two transistors.Reason (R) : in the two transistor analogy of the SCR, the SCR can be considered as an npn and a pnp transistor, where the collector of one transistor is attached to the emitter of the other and vice-versa.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'C'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
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