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SSC IMD Electronics Quiz 2017

Q1. As compared to bipolar junction transistor, a FET

(a) is less noisy

(b) has better thermal stability

(c) has higher input resistance

(d) all of the above


Q2. For a P-N diode, the number of minority carriers crossing the junction depends on

(a) forward bias voltage

(b) potential barrier

(c) rate of thermal generation of electron hole pairs

(d) none of the above


Q3. Which variety of copper has the best conductivity?

(a) Pure annealed copper

(b) Hard drawn copper

(c) Induction hardened copper

(d) Copper containing traces of silicon


Q4. The output, V-I characteristics of an Enhancement type MOSFET has

(a) only an ohmic region

(b) only a saturation region

(c) an ohmic region at low voltage value followed by a saturation region at higher voltages

(d) an ohmic region at large voltage values preceded by a saturation region at lower voltages


Q5. Piezoelectric quartz crystal resonators find application where

(a) signal amplification is required

(b) rectification of the signal is required

(c) signal frequency control is required

(d) modulation of signal is required


Q6. The forbidden energy gap between the valence band and conduction band will be least in case of

(a) metals

(b) semiconductors

(c) insulators

(d) all of the above


Q7. If too large current passes through the diode

(a) all electrons will leave

(b) all holes will freeze

(c) excessive heat may damage the diode

(d) diode will emit light


Q8. In a bipolar transistor, the emitter base junction has

(a) forward bias

(b) reverse bias

(c) zero bias

(d) zero or reverse bias


Q9. A sine wave has a frequency of 50 Hz. Its angular frequency is _______ radian/second.

(a) 100 n

(b) 50 jt

(c) 25 JT

(d) 5 n


Q10. The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes _____ ohms.

(a) 2.5

(b) 5

(c) 10

(d) 15


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