A string of series connected thyristors needs equalising circuit to ensure prope

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Question
A string of series connected thyristors needs equalising circuit to
Options
A. ensure proper firing
B. ensure proper current division
C. ensure proper voltage division
D. none of the above

Correct Answer

ensure proper voltage division

More questions

1. Assertion (A): Chopper always requires forced commutation
Reason (R): Morgan chopper uses a saturable reactor.
Options
A. Both A and R are correct and R is correct explanation of A
B. Both A and R correct but R is not correct explanation of A
C. A is correct but R is wrong
D. A is wrong but R is correct

2. Assertion (A): In the interaction region of magnetron an electron is subjected to three forces: force due to electric field, force due to magnetic field and centrifugal force.
Reason (R): The mechanism of generation of microwaves, in a magnetron, involves interaction of electromagnetic fields with electrons moving in static electric and magnetic fields oriented at right angles to each other.
Options
A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is correct but R is wrong
D. A is wrong but R is correct

3. Match the following:

	List I		List II
A.	Resistance	1.	M^-1L^-2T²I²
B.	Inductance	2.	ML²T^-2I^-2
C.	Capacitance	3.	M^-1L^-2T⁴I²
D.	Reluctance	4.	ML²T^-3I^-2

Options
A. A-1, B-2, C-3, D-4
B. A-2, B-1, C-3, D-4
C. A-4, B-2, C-3, D-1
D. A-2, B-4, C-3, D-1

4. Match the following:

	List I (Set operation)		List II (Set operator)
A.	Set equality	1.	-
B.	Set inclusion	2.	=
C.	Set intersection	3.	< =
D.	Set difference	4.	?

Options
A. A-2, B-3, C-4, D-1
B. A-3, B-2, C-4, D-1
C. A-1, B-2, C-3, D-4
D. A-4, B-2, C-3, D-1

5. Assertion (A): A GTO circuit is more compact than SCR circuit
Reason (R): A GTO can be turned off by negative gate pulse.
Options
A. Both A and R are correct and R is correct explanation of A
B. Both A and R correct but R is not correct explanation of A
C. A is correct but R is wrong
D. A is wrong but R is correct

6. Assertion (A): For high frequency lines inductive reactance is very high as compared to ac resistance.
Reason (R): Due to skin effect ac resistance of line is higher than dc resistance.
Options
A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is correct but R is wrong
D. A is wrong but R is correct

7. Match the following:

	List I (Network parameter)		List II (Measured under open-circuit conditions)
A.	Z₁₁	1.
B.	A	2.
C.	C	3.
D.	Z₂₂	4.

Options
A. A-1, B-4, C-2, D-3
B. A-3, B-4, C-2, D-1
C. A-1, B-2, C-4, D-3
D. A-3, B-2, C-4, D-1

8. Match the following:

	List I		List II
A.		1.	Zero
B.		2.	0.2
C.		3.	Actuator
D.		4.	infinity

Options
A. A-1, B-2, C-3, D-4
B. A-1, B-3, C-2, D-4
C. A-4, B-3, C-2, D-1
D. A-4, B-2, C-3, D-1

9. Match the following:

	List I f(t)		List II F (s)
A.	cos ?t	1.
B.	sin ?t	2.
C.	cosh ?t	3.
D.	sinh ?t	4.

Options
A. A-1, B-3, C-2, D-4
B. A-4, B-2, C-1, D-3
C. A-4, B-3, C-1, D-2
D. A-3, B-2, C-1, D-4

10. Assertion (A): Power loss in a conductor of resistance P = I²R.
Reason (R): When a conductor is carrying current with current density J as a result of applied field E, then heat developed/m³/ second = JE.
Options
A. Both A and R are true and R is correct explanation of A
B. Both A and R are true but R is not correct explanation of A
C. A is true but R is false
D. A is false but R is true

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