Wireman 1st year mcq

Wireman – Semester 1 Module 10: Basic Electronics

236 : Which element is used as semi conductor?
A : Silver
B : Silicon
C : Copper
D : Aluminium

237 : How many electrons in a silicon atom?
A : 7
B : 14
C : 29
D : 32

238 : How the N type semi conductor is formed?
A : Germanium with aluminium
B : Silicon with antimony
C : Silicon with iridium
D : Silicon with arsenic

239 : Which element is used as impurity to provide N type semi conductor?
A : Arsenic
B : Aluminium
C : Gallium
D : Boron

240 : How the P – type semiconductor is formed?
A : Germanium with phosphorus
B : Silicon with aluminium
C : Germanium with antimony
D : Germanium with aluminium

241 : What does the depletion region behave?
A : Conductor
B : Insulator
C : Semi conductor
D : Resistor

242 : What does letter2N indicate in the semiconductor device?
A : The diode PN junctions
B : The number of terminals
C : The device power
D : Two junction device

243 : What is the use of LED?
A : To rectify AC to DC
B : To reduce the ripple
C : To regulate the voltage
D : To indicate light

244 : What is the function of forward biased PN junction diode?
A : Act as uni directional switch
B : Act as bi directional switch
C : Act as control switch
D : Act as limit switch

245 : What is the PIV of the diode if the AC input voltage is 24V?
A : 32 V
B : 33 V
C : 34 V
D : 36 V

246 : What is the purpose of heat sink in electronic circuit?
A : Keep temperature desired range
B : Keep voltage desired range
C : Keep currents desired range
D : Keep resistance desired range

247 : Which material is used for making heat sink?
A : Copper
B : Aluminium
C : Iron
D : Zinc

248 : What is the expansion of PIV?
A : Peak Input Voltage
B : Positive Inverse Voltage
C : Peak Inverse Voltage
D : Phase Inverse Voltage

249 : What is the relation between input AC voltage (VAC) and output DC voltage (VDC) in full wave rectifier?

250 : Which type of filter?

A : PI filter
B : Series Inductor filter
C : RC filter
D : Choke input LC filter