A single phase fully controlled rectifier is supplying a load with an anti-parallel diode as
shown in the figure. All switches and diodes are ideal. Which one of the following is true
for instantaneous load voltage and current?
A
$${v_0} \ge 0\,\,\& \,\,{i_0} < 0$$
B
$${v_0} < 0\,\,\& \,\,{i_0} < 0$$
C
$${v_0} \ge 0\,\,\& \,\,{i_0} \ge 0$$
D
$${v_0} < 0\,\,\& \,\,{i_0} \ge 0$$
2
GATE EE 2018
Numerical
+2
-0
A phase controlled single phase rectifier, supplied by an AC source, feeds power to an
R-L-E load as shown in the figure. The rectifier output voltage has an average value given
by $${V_0} = {{{V_m}} \over {2\pi }}\left( {3 + \cos \alpha } \right)$$, where $${V_m} = 80\pi $$ volts and $$\alpha $$ is the firing angle. If the power
delivered to the lossless battery is 1600 W, $$\alpha $$ in degree is________ (up to 2 decimal
places).
Your input ____
3
GATE EE 2018
MCQ (Single Correct Answer)
+1
-0.3
Four power semiconductor devices are shown in the figure along with their relevant
terminals. The device(s) that can carry dc current continuously in the direction shown when
gated appropriately is (are)
A
Triac only
B
Triac and MOSFET
C
Triac and GTO
D
Thyristor and Triac
4
GATE EE 2018
MCQ (Single Correct Answer)
+2
-0.67
Consider the two bus power system network with given loads as shown in the figure. All
the values shown in the figure are in per unit. The reactive power supplied by generator G1
and G2 are QG1 and QG2 respectively. The per unit values of QG1, QG2, and line reactive
power loss (Qloss) respectively are
