1
GATE EE 2017 Set 2
Numerical
+1
-0
The figure below shows the circuit diagram of a controlled rectifier supplied from a $$230V,$$ $$50$$ $$Hz,$$ $$1$$-phase voltage source and a $$10:1$$ ideal transformer. Assume that all devices are ideal. The firing angles of the thyristors $${T_1}$$ and $${T_2}$$ are $${90^ \circ }$$ and $${270^ \circ },$$ respectively.

The $$RMS$$ value of the current through diode $${D_3}$$ in amperes is ________________.

2
GATE EE 2012
MCQ (Single Correct Answer)
+1
-0.3
A half-controlled single-phase bridge rectifier is supplying an $$R$$-$$L$$ load. It is operated at a firing angle $$α$$ and the load current is continuous. The fraction of cycle that the freewheeling diode conducts is
A
$${1 \over 2}$$
B
$$\left( {1 - {\alpha \over \pi }} \right)$$
C
$${\alpha \over {2\pi }}$$
D
$${\alpha \over {\pi }}$$
3
GATE EE 2010
MCQ (Single Correct Answer)
+1
-0.3
The fully controlled thyristor converter in the figure is fed from a single-phase source. When the firing angle is $${0^ \circ }$$, the $$dc$$ output voltage of the converter is $$300V.$$ What will be the output voltage for a firing angle of $${60^ \circ }$$, assuming continuous conduction?
A
$$150V$$
B
$$210V$$
C
$$300V$$
D
$$100\pi V$$
4
GATE EE 2007
MCQ (Single Correct Answer)
+1
-0.3
A single $$-$$ phase fully controlled thyristor bridge $$ac$$ $$-$$ $$dc$$ converter is operating at a firing angle of $${25^ \circ }$$ and an overlap angle of $${10^ \circ }$$ constant $$dc$$ output current of $$20$$ $$A$$. The fundamental power factor (displacement factor) at input $$ac$$ mains is
A
$$0.78$$
B
$$0.827$$
C
$$0.866$$
D
$$0.9$$
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
Civil Services
UPSC Civil Service
CBSE
Class 12