171. AC power in a load can be controlled by using____________?
A. Two SCR’s in parallel opposition
B. Two SCR’s in series
C. Three SCR’s in series
D. Four SCR’s in series

172. In a silicon controlled rectifier, the load is connected___________?
A. Across anode
B. In series with anode
C. Across cathode
D. In series with cathode

173. An SCR is made up of silicon because?
A. silicon has large leakage current than germanium
B. silicon has small leakage current than germanium
C. silicon has small leakage voltage than germanium
D. silicon has large leakage voltage than germanium

174. Anode of an operational SCR is _______________?
A. Always positive w.r.t cathode
B. Always negative w.r.t anode
C. Always positive w.r.t anode
D. Always negative w.r.t cathode

175. If the gate voltage of an SCR is removed, then the_______________?
A. anode current decreases
B. anode current does not decrease at all
C. anode current increases
D. cathode current increases

176. The output power of the cascaded amplifier / attenuator system can be determined using___________?
A. Actual gain of amplifier
B. Actual gain of amplifier and attenuator
C. Gain in dB of amplifier and attenuator
D. Actual gain of attenuator

177. A single phase ac – dc converter is also known as____________?
A. rectifier
B. inverter
C. chopper
D. regulator

178. In a single phase full wave rectifier, during blocking state the pea inverse voltage of diode is______________?
A. V m
B. 2 V m
C. V m / 2
D. 4 V m

179. LISN is a device used to measure conducted emissions. LISN stands for_____________?
A. Line integrated stabilization network
B. Line impedance stabilization network
C. Line integrated stored network
D. Laser integrated stabilization networking

180. In a full wave rectifier, the rectification ratio is approximately equal to____________?
A. 61%
B. 71%
C. 81%
D. 91%

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