Rajasthan Technical Education Second Year Paper 2016 – Electronic Component and Shop Practice

Which one of the following has negative temperature coefficient ?
(a) Voltage dependent resistor
(b) Sensistor
(c) Thermistor
(d) Fusible resistor

To which of the following is bifiller winding related ?
(a) induction motor
(b) Inductor
(c) Resistance
(d) Electro-magnet

High capacitance value capacitors are
(a) Paper capacitor
(b) Electrolyte capacitor
(c) Plastic capacitor
(d) Gang capacitor

Timmers are
(a) semivariable resistance
(b) semivariable capacitor
(c) variable resistor
(d) variable capacitor

In any conductor skin depth is 1 mm for the current of frequency f, then what is its value for the current of frequency 2f?
(a) 2 mm
(b) 1.41 mm
(c) 1 mm
(d) 0.707 mm

Which core material is best suited for construction of radio frequency coils ?
(a) Iron
(b) Ferrite
(c) Air
(d) Diamagnetic substance

Two magnetic coils (each of value L) are connected serially alongwith magnetic coupling (R=1). What will be the resultant inductance’s minimum and maximum values respectively?
(a) 0, 4L
(b) 0, 2L
(c) 2L, 4L
(d) L/2, 2L

Two methods of mass soldering are
(a) Wave and Dip
(b) Hand and Wave
(c) Dip and Hand
(d) None fo the above

What is the working principle of desoldering pump ?
(a) Vaccum suction
(b) Pressure suction
(c) Combustion
(d) Grinding

Solder material comprises of
(a) Silver
(b) Tin
(c) Lead
(d) Tin and Lead